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668 lines
16 KiB
668 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2000-2002 Michael Cornwell <[email protected]> |
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* Copyright (C) 2000-2002 Andre Hedrick <[email protected]> |
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* Copyright (C) 2001-2002 Klaus Smolin |
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* IBM Storage Technology Division |
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* Copyright (C) 2003-2004, 2007 Bartlomiej Zolnierkiewicz |
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* |
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* The big the bad and the ugly. |
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*/ |
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#include <linux/types.h> |
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#include <linux/string.h> |
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#include <linux/kernel.h> |
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#include <linux/export.h> |
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#include <linux/sched.h> |
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#include <linux/interrupt.h> |
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#include <linux/errno.h> |
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#include <linux/slab.h> |
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#include <linux/delay.h> |
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#include <linux/hdreg.h> |
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#include <linux/ide.h> |
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#include <linux/nmi.h> |
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#include <linux/scatterlist.h> |
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#include <linux/uaccess.h> |
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#include <asm/io.h> |
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void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
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|
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/* Be sure we're looking at the low order bytes */ |
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tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
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tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf); |
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if (cmd->tf_flags & IDE_TFLAG_LBA48) { |
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tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS); |
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tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob); |
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} |
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} |
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void ide_tf_dump(const char *s, struct ide_cmd *cmd) |
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{ |
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#ifdef DEBUG |
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printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x " |
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"lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n", |
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s, cmd->tf.feature, cmd->tf.nsect, |
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cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah, |
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cmd->tf.device, cmd->tf.command); |
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printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n", |
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s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah); |
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#endif |
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} |
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int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf) |
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{ |
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struct ide_cmd cmd; |
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memset(&cmd, 0, sizeof(cmd)); |
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cmd.tf.nsect = 0x01; |
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if (drive->media == ide_disk) |
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cmd.tf.command = ATA_CMD_ID_ATA; |
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else |
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cmd.tf.command = ATA_CMD_ID_ATAPI; |
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cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
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cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
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cmd.protocol = ATA_PROT_PIO; |
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return ide_raw_taskfile(drive, &cmd, buf, 1); |
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} |
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static ide_startstop_t task_no_data_intr(ide_drive_t *); |
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static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *); |
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static ide_startstop_t task_pio_intr(ide_drive_t *); |
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ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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struct ide_cmd *cmd = &hwif->cmd; |
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struct ide_taskfile *tf = &cmd->tf; |
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ide_handler_t *handler = NULL; |
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const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
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const struct ide_dma_ops *dma_ops = hwif->dma_ops; |
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if (orig_cmd->protocol == ATA_PROT_PIO && |
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(orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) && |
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drive->mult_count == 0) { |
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pr_err("%s: multimode not set!\n", drive->name); |
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return ide_stopped; |
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} |
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if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED) |
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orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS; |
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memcpy(cmd, orig_cmd, sizeof(*cmd)); |
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if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) { |
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ide_tf_dump(drive->name, cmd); |
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tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
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if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) { |
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u8 data[2] = { cmd->tf.data, cmd->hob.data }; |
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tp_ops->output_data(drive, cmd, data, 2); |
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} |
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if (cmd->valid.out.tf & IDE_VALID_DEVICE) { |
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u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? |
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0xE0 : 0xEF; |
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if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED)) |
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cmd->tf.device &= HIHI; |
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cmd->tf.device |= drive->select; |
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} |
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tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob); |
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tp_ops->tf_load(drive, &cmd->tf, cmd->valid.out.tf); |
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} |
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switch (cmd->protocol) { |
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case ATA_PROT_PIO: |
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if (cmd->tf_flags & IDE_TFLAG_WRITE) { |
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tp_ops->exec_command(hwif, tf->command); |
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ndelay(400); /* FIXME */ |
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return pre_task_out_intr(drive, cmd); |
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} |
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handler = task_pio_intr; |
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fallthrough; |
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case ATA_PROT_NODATA: |
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if (handler == NULL) |
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handler = task_no_data_intr; |
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ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE); |
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return ide_started; |
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case ATA_PROT_DMA: |
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if (ide_dma_prepare(drive, cmd)) |
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return ide_stopped; |
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hwif->expiry = dma_ops->dma_timer_expiry; |
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ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD); |
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dma_ops->dma_start(drive); |
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fallthrough; |
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default: |
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return ide_started; |
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} |
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} |
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EXPORT_SYMBOL_GPL(do_rw_taskfile); |
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static ide_startstop_t task_no_data_intr(ide_drive_t *drive) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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struct ide_cmd *cmd = &hwif->cmd; |
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struct ide_taskfile *tf = &cmd->tf; |
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int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0; |
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int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1; |
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u8 stat; |
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local_irq_enable_in_hardirq(); |
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while (1) { |
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stat = hwif->tp_ops->read_status(hwif); |
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if ((stat & ATA_BUSY) == 0 || retries-- == 0) |
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break; |
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udelay(10); |
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}; |
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if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) { |
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if (custom && tf->command == ATA_CMD_SET_MULTI) { |
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drive->mult_req = drive->mult_count = 0; |
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drive->special_flags |= IDE_SFLAG_RECALIBRATE; |
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(void)ide_dump_status(drive, __func__, stat); |
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return ide_stopped; |
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} else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) { |
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if ((stat & (ATA_ERR | ATA_DRQ)) == 0) { |
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ide_set_handler(drive, &task_no_data_intr, |
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WAIT_WORSTCASE); |
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return ide_started; |
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} |
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} |
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return ide_error(drive, "task_no_data_intr", stat); |
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} |
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if (custom && tf->command == ATA_CMD_SET_MULTI) |
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drive->mult_count = drive->mult_req; |
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if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE || |
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tf->command == ATA_CMD_CHK_POWER) { |
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struct request *rq = hwif->rq; |
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if (ata_pm_request(rq)) |
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ide_complete_pm_rq(drive, rq); |
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else |
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ide_finish_cmd(drive, cmd, stat); |
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} |
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return ide_stopped; |
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} |
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static u8 wait_drive_not_busy(ide_drive_t *drive) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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int retries; |
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u8 stat; |
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/* |
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* Last sector was transferred, wait until device is ready. This can |
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* take up to 6 ms on some ATAPI devices, so we will wait max 10 ms. |
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*/ |
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for (retries = 0; retries < 1000; retries++) { |
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stat = hwif->tp_ops->read_status(hwif); |
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if (stat & ATA_BUSY) |
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udelay(10); |
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else |
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break; |
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} |
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if (stat & ATA_BUSY) |
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pr_err("%s: drive still BUSY!\n", drive->name); |
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return stat; |
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} |
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void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, |
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unsigned int write, unsigned int len) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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struct scatterlist *sg = hwif->sg_table; |
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struct scatterlist *cursg = cmd->cursg; |
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struct page *page; |
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unsigned int offset; |
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u8 *buf; |
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if (cursg == NULL) |
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cursg = cmd->cursg = sg; |
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while (len) { |
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unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs); |
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page = sg_page(cursg); |
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offset = cursg->offset + cmd->cursg_ofs; |
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/* get the current page and offset */ |
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page = nth_page(page, (offset >> PAGE_SHIFT)); |
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offset %= PAGE_SIZE; |
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nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset)); |
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buf = kmap_atomic(page) + offset; |
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cmd->nleft -= nr_bytes; |
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cmd->cursg_ofs += nr_bytes; |
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if (cmd->cursg_ofs == cursg->length) { |
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cursg = cmd->cursg = sg_next(cmd->cursg); |
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cmd->cursg_ofs = 0; |
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} |
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/* do the actual data transfer */ |
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if (write) |
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hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes); |
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else |
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hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes); |
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kunmap_atomic(buf); |
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len -= nr_bytes; |
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} |
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} |
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EXPORT_SYMBOL_GPL(ide_pio_bytes); |
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static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd, |
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unsigned int write) |
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{ |
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unsigned int nr_bytes; |
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u8 saved_io_32bit = drive->io_32bit; |
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if (cmd->tf_flags & IDE_TFLAG_FS) |
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scsi_req(cmd->rq)->result = 0; |
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if (cmd->tf_flags & IDE_TFLAG_IO_16BIT) |
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drive->io_32bit = 0; |
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touch_softlockup_watchdog(); |
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if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) |
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nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9); |
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else |
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nr_bytes = SECTOR_SIZE; |
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ide_pio_bytes(drive, cmd, write, nr_bytes); |
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drive->io_32bit = saved_io_32bit; |
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} |
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static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) |
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{ |
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if (cmd->tf_flags & IDE_TFLAG_FS) { |
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int nr_bytes = cmd->nbytes - cmd->nleft; |
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if (cmd->protocol == ATA_PROT_PIO && |
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((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) { |
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if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) |
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nr_bytes -= drive->mult_count << 9; |
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else |
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nr_bytes -= SECTOR_SIZE; |
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} |
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if (nr_bytes > 0) |
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ide_complete_rq(drive, BLK_STS_OK, nr_bytes); |
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} |
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} |
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void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat) |
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{ |
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struct request *rq = drive->hwif->rq; |
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u8 err = ide_read_error(drive), nsect = cmd->tf.nsect; |
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u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER); |
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ide_complete_cmd(drive, cmd, stat, err); |
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scsi_req(rq)->result = err; |
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if (err == 0 && set_xfer) { |
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ide_set_xfer_rate(drive, nsect); |
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ide_driveid_update(drive); |
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} |
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ide_complete_rq(drive, err ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq)); |
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} |
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/* |
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* Handler for command with PIO data phase. |
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*/ |
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static ide_startstop_t task_pio_intr(ide_drive_t *drive) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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struct ide_cmd *cmd = &drive->hwif->cmd; |
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u8 stat = hwif->tp_ops->read_status(hwif); |
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u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE); |
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if (write == 0) { |
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/* Error? */ |
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if (stat & ATA_ERR) |
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goto out_err; |
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/* Didn't want any data? Odd. */ |
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if ((stat & ATA_DRQ) == 0) { |
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/* Command all done? */ |
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if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) |
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goto out_end; |
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|
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/* Assume it was a spurious irq */ |
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goto out_wait; |
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} |
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} else { |
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if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) |
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goto out_err; |
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/* Deal with unexpected ATA data phase. */ |
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if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0)) |
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goto out_err; |
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} |
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if (write && cmd->nleft == 0) |
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goto out_end; |
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/* Still data left to transfer. */ |
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ide_pio_datablock(drive, cmd, write); |
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/* Are we done? Check status and finish transfer. */ |
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if (write == 0 && cmd->nleft == 0) { |
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stat = wait_drive_not_busy(drive); |
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if (!OK_STAT(stat, 0, BAD_STAT)) |
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goto out_err; |
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goto out_end; |
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} |
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out_wait: |
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/* Still data left to transfer. */ |
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ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE); |
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return ide_started; |
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out_end: |
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if ((cmd->tf_flags & IDE_TFLAG_FS) == 0) |
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ide_finish_cmd(drive, cmd, stat); |
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else |
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ide_complete_rq(drive, BLK_STS_OK, blk_rq_sectors(cmd->rq) << 9); |
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return ide_stopped; |
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out_err: |
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ide_error_cmd(drive, cmd); |
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return ide_error(drive, __func__, stat); |
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} |
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static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, |
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struct ide_cmd *cmd) |
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{ |
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ide_startstop_t startstop; |
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if (ide_wait_stat(&startstop, drive, ATA_DRQ, |
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drive->bad_wstat, WAIT_DRQ)) { |
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pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name, |
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(cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "", |
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(drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : ""); |
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return startstop; |
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} |
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if (!force_irqthreads && (drive->dev_flags & IDE_DFLAG_UNMASK) == 0) |
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local_irq_disable(); |
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ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE); |
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ide_pio_datablock(drive, cmd, 1); |
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return ide_started; |
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} |
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int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf, |
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u16 nsect) |
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{ |
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struct request *rq; |
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int error; |
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rq = blk_get_request(drive->queue, |
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(cmd->tf_flags & IDE_TFLAG_WRITE) ? |
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REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); |
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ide_req(rq)->type = ATA_PRIV_TASKFILE; |
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/* |
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* (ks) We transfer currently only whole sectors. |
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* This is suffient for now. But, it would be great, |
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* if we would find a solution to transfer any size. |
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* To support special commands like READ LONG. |
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*/ |
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if (nsect) { |
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error = blk_rq_map_kern(drive->queue, rq, buf, |
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nsect * SECTOR_SIZE, GFP_NOIO); |
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if (error) |
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goto put_req; |
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} |
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ide_req(rq)->special = cmd; |
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cmd->rq = rq; |
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blk_execute_rq(drive->queue, NULL, rq, 0); |
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error = scsi_req(rq)->result ? -EIO : 0; |
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put_req: |
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blk_put_request(rq); |
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return error; |
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} |
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EXPORT_SYMBOL(ide_raw_taskfile); |
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int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd) |
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{ |
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cmd->protocol = ATA_PROT_NODATA; |
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|
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return ide_raw_taskfile(drive, cmd, NULL, 0); |
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} |
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EXPORT_SYMBOL_GPL(ide_no_data_taskfile); |
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|
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#ifdef CONFIG_IDE_TASK_IOCTL |
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int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg) |
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{ |
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ide_task_request_t *req_task; |
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struct ide_cmd cmd; |
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u8 *outbuf = NULL; |
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u8 *inbuf = NULL; |
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u8 *data_buf = NULL; |
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int err = 0; |
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int tasksize = sizeof(struct ide_task_request_s); |
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unsigned int taskin = 0; |
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unsigned int taskout = 0; |
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u16 nsect = 0; |
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char __user *buf = (char __user *)arg; |
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|
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req_task = memdup_user(buf, tasksize); |
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if (IS_ERR(req_task)) |
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return PTR_ERR(req_task); |
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|
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taskout = req_task->out_size; |
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taskin = req_task->in_size; |
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|
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if (taskin > 65536 || taskout > 65536) { |
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err = -EINVAL; |
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goto abort; |
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} |
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if (taskout) { |
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int outtotal = tasksize; |
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outbuf = kzalloc(taskout, GFP_KERNEL); |
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if (outbuf == NULL) { |
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err = -ENOMEM; |
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goto abort; |
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} |
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if (copy_from_user(outbuf, buf + outtotal, taskout)) { |
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err = -EFAULT; |
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goto abort; |
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} |
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} |
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if (taskin) { |
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int intotal = tasksize + taskout; |
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inbuf = kzalloc(taskin, GFP_KERNEL); |
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if (inbuf == NULL) { |
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err = -ENOMEM; |
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goto abort; |
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} |
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if (copy_from_user(inbuf, buf + intotal, taskin)) { |
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err = -EFAULT; |
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goto abort; |
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} |
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} |
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memset(&cmd, 0, sizeof(cmd)); |
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|
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memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2); |
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memcpy(&cmd.tf, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE); |
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|
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cmd.valid.out.tf = IDE_VALID_DEVICE; |
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cmd.valid.in.tf = IDE_VALID_DEVICE | IDE_VALID_IN_TF; |
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cmd.tf_flags = IDE_TFLAG_IO_16BIT; |
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|
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if (drive->dev_flags & IDE_DFLAG_LBA48) { |
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cmd.tf_flags |= IDE_TFLAG_LBA48; |
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cmd.valid.in.hob = IDE_VALID_IN_HOB; |
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} |
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|
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if (req_task->out_flags.all) { |
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cmd.ftf_flags |= IDE_FTFLAG_FLAGGED; |
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|
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if (req_task->out_flags.b.data) |
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cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA; |
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|
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if (req_task->out_flags.b.nsector_hob) |
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cmd.valid.out.hob |= IDE_VALID_NSECT; |
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if (req_task->out_flags.b.sector_hob) |
|
cmd.valid.out.hob |= IDE_VALID_LBAL; |
|
if (req_task->out_flags.b.lcyl_hob) |
|
cmd.valid.out.hob |= IDE_VALID_LBAM; |
|
if (req_task->out_flags.b.hcyl_hob) |
|
cmd.valid.out.hob |= IDE_VALID_LBAH; |
|
|
|
if (req_task->out_flags.b.error_feature) |
|
cmd.valid.out.tf |= IDE_VALID_FEATURE; |
|
if (req_task->out_flags.b.nsector) |
|
cmd.valid.out.tf |= IDE_VALID_NSECT; |
|
if (req_task->out_flags.b.sector) |
|
cmd.valid.out.tf |= IDE_VALID_LBAL; |
|
if (req_task->out_flags.b.lcyl) |
|
cmd.valid.out.tf |= IDE_VALID_LBAM; |
|
if (req_task->out_flags.b.hcyl) |
|
cmd.valid.out.tf |= IDE_VALID_LBAH; |
|
} else { |
|
cmd.valid.out.tf |= IDE_VALID_OUT_TF; |
|
if (cmd.tf_flags & IDE_TFLAG_LBA48) |
|
cmd.valid.out.hob |= IDE_VALID_OUT_HOB; |
|
} |
|
|
|
if (req_task->in_flags.b.data) |
|
cmd.ftf_flags |= IDE_FTFLAG_IN_DATA; |
|
|
|
if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) { |
|
/* fixup data phase if needed */ |
|
if (req_task->data_phase == TASKFILE_IN_DMAQ || |
|
req_task->data_phase == TASKFILE_IN_DMA) |
|
cmd.tf_flags |= IDE_TFLAG_WRITE; |
|
} |
|
|
|
cmd.protocol = ATA_PROT_DMA; |
|
|
|
switch (req_task->data_phase) { |
|
case TASKFILE_MULTI_OUT: |
|
if (!drive->mult_count) { |
|
/* (hs): give up if multcount is not set */ |
|
pr_err("%s: %s Multimode Write multcount is not set\n", |
|
drive->name, __func__); |
|
err = -EPERM; |
|
goto abort; |
|
} |
|
cmd.tf_flags |= IDE_TFLAG_MULTI_PIO; |
|
fallthrough; |
|
case TASKFILE_OUT: |
|
cmd.protocol = ATA_PROT_PIO; |
|
fallthrough; |
|
case TASKFILE_OUT_DMAQ: |
|
case TASKFILE_OUT_DMA: |
|
cmd.tf_flags |= IDE_TFLAG_WRITE; |
|
nsect = taskout / SECTOR_SIZE; |
|
data_buf = outbuf; |
|
break; |
|
case TASKFILE_MULTI_IN: |
|
if (!drive->mult_count) { |
|
/* (hs): give up if multcount is not set */ |
|
pr_err("%s: %s Multimode Read multcount is not set\n", |
|
drive->name, __func__); |
|
err = -EPERM; |
|
goto abort; |
|
} |
|
cmd.tf_flags |= IDE_TFLAG_MULTI_PIO; |
|
fallthrough; |
|
case TASKFILE_IN: |
|
cmd.protocol = ATA_PROT_PIO; |
|
fallthrough; |
|
case TASKFILE_IN_DMAQ: |
|
case TASKFILE_IN_DMA: |
|
nsect = taskin / SECTOR_SIZE; |
|
data_buf = inbuf; |
|
break; |
|
case TASKFILE_NO_DATA: |
|
cmd.protocol = ATA_PROT_NODATA; |
|
break; |
|
default: |
|
err = -EFAULT; |
|
goto abort; |
|
} |
|
|
|
if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA) |
|
nsect = 0; |
|
else if (!nsect) { |
|
nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect; |
|
|
|
if (!nsect) { |
|
pr_err("%s: in/out command without data\n", |
|
drive->name); |
|
err = -EFAULT; |
|
goto abort; |
|
} |
|
} |
|
|
|
err = ide_raw_taskfile(drive, &cmd, data_buf, nsect); |
|
|
|
memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2); |
|
memcpy(req_task->io_ports, &cmd.tf, HDIO_DRIVE_TASK_HDR_SIZE); |
|
|
|
if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) && |
|
req_task->in_flags.all == 0) { |
|
req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; |
|
if (drive->dev_flags & IDE_DFLAG_LBA48) |
|
req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8); |
|
} |
|
|
|
if (copy_to_user(buf, req_task, tasksize)) { |
|
err = -EFAULT; |
|
goto abort; |
|
} |
|
if (taskout) { |
|
int outtotal = tasksize; |
|
if (copy_to_user(buf + outtotal, outbuf, taskout)) { |
|
err = -EFAULT; |
|
goto abort; |
|
} |
|
} |
|
if (taskin) { |
|
int intotal = tasksize + taskout; |
|
if (copy_to_user(buf + intotal, inbuf, taskin)) { |
|
err = -EFAULT; |
|
goto abort; |
|
} |
|
} |
|
abort: |
|
kfree(req_task); |
|
kfree(outbuf); |
|
kfree(inbuf); |
|
|
|
return err; |
|
} |
|
#endif
|
|
|