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55 lines
1.4 KiB
55 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* 32bit -> 64bit ioctl wrapper for hwdep API |
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* Copyright (c) by Takashi Iwai <[email protected]> |
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*/ |
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/* This file is included from hwdep.c */ |
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#include <linux/compat.h> |
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struct snd_hwdep_dsp_image32 { |
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u32 index; |
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unsigned char name[64]; |
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u32 image; /* pointer */ |
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u32 length; |
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u32 driver_data; |
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} /* don't set packed attribute here */; |
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static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw, |
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struct snd_hwdep_dsp_image32 __user *src) |
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{ |
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struct snd_hwdep_dsp_image info = {}; |
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compat_caddr_t ptr; |
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if (copy_from_user(&info, src, 4 + 64) || |
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get_user(ptr, &src->image) || |
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get_user(info.length, &src->length) || |
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get_user(info.driver_data, &src->driver_data)) |
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return -EFAULT; |
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info.image = compat_ptr(ptr); |
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return snd_hwdep_dsp_load(hw, &info); |
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} |
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enum { |
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SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct snd_hwdep_dsp_image32) |
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}; |
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static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd, |
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unsigned long arg) |
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{ |
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struct snd_hwdep *hw = file->private_data; |
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void __user *argp = compat_ptr(arg); |
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switch (cmd) { |
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case SNDRV_HWDEP_IOCTL_PVERSION: |
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case SNDRV_HWDEP_IOCTL_INFO: |
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case SNDRV_HWDEP_IOCTL_DSP_STATUS: |
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return snd_hwdep_ioctl(file, cmd, (unsigned long)argp); |
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case SNDRV_HWDEP_IOCTL_DSP_LOAD32: |
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return snd_hwdep_dsp_load_compat(hw, argp); |
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} |
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if (hw->ops.ioctl_compat) |
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return hw->ops.ioctl_compat(hw, file, cmd, arg); |
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return -ENOIOCTLCMD; |
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}
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