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252 lines
5.7 KiB
252 lines
5.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* Copyright (C) 2021 Intel Corporation */ |
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#include <net/bluetooth/bluetooth.h> |
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#include <net/bluetooth/hci_core.h> |
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#include "hci_codec.h" |
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static int hci_codec_list_add(struct list_head *list, |
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struct hci_op_read_local_codec_caps *sent, |
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struct hci_rp_read_local_codec_caps *rp, |
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void *caps, |
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__u32 len) |
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{ |
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struct codec_list *entry; |
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entry = kzalloc(sizeof(*entry) + len, GFP_KERNEL); |
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if (!entry) |
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return -ENOMEM; |
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entry->id = sent->id; |
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if (sent->id == 0xFF) { |
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entry->cid = __le16_to_cpu(sent->cid); |
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entry->vid = __le16_to_cpu(sent->vid); |
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} |
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entry->transport = sent->transport; |
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entry->len = len; |
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entry->num_caps = 0; |
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if (rp) { |
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entry->num_caps = rp->num_caps; |
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memcpy(entry->caps, caps, len); |
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} |
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list_add(&entry->list, list); |
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return 0; |
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} |
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void hci_codec_list_clear(struct list_head *codec_list) |
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{ |
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struct codec_list *c, *n; |
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list_for_each_entry_safe(c, n, codec_list, list) { |
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list_del(&c->list); |
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kfree(c); |
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} |
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} |
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static void hci_read_codec_capabilities(struct hci_dev *hdev, __u8 transport, |
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struct hci_op_read_local_codec_caps |
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*cmd) |
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{ |
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__u8 i; |
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for (i = 0; i < TRANSPORT_TYPE_MAX; i++) { |
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if (transport & BIT(i)) { |
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struct hci_rp_read_local_codec_caps *rp; |
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struct hci_codec_caps *caps; |
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struct sk_buff *skb; |
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__u8 j; |
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__u32 len; |
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cmd->transport = i; |
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/* If Read_Codec_Capabilities command is not supported |
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* then just add codec to the list without caps |
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*/ |
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if (!(hdev->commands[45] & 0x08)) { |
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hci_dev_lock(hdev); |
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hci_codec_list_add(&hdev->local_codecs, cmd, |
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NULL, NULL, 0); |
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hci_dev_unlock(hdev); |
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continue; |
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} |
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skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODEC_CAPS, |
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sizeof(*cmd), cmd, |
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HCI_CMD_TIMEOUT); |
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if (IS_ERR(skb)) { |
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bt_dev_err(hdev, "Failed to read codec capabilities (%ld)", |
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PTR_ERR(skb)); |
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continue; |
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} |
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if (skb->len < sizeof(*rp)) |
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goto error; |
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rp = (void *)skb->data; |
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if (rp->status) |
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goto error; |
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if (!rp->num_caps) { |
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len = 0; |
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/* this codec doesn't have capabilities */ |
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goto skip_caps_parse; |
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} |
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skb_pull(skb, sizeof(*rp)); |
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for (j = 0, len = 0; j < rp->num_caps; j++) { |
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caps = (void *)skb->data; |
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if (skb->len < sizeof(*caps)) |
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goto error; |
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if (skb->len < caps->len) |
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goto error; |
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len += sizeof(caps->len) + caps->len; |
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skb_pull(skb, sizeof(caps->len) + caps->len); |
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} |
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skip_caps_parse: |
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hci_dev_lock(hdev); |
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hci_codec_list_add(&hdev->local_codecs, cmd, rp, |
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(__u8 *)rp + sizeof(*rp), len); |
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hci_dev_unlock(hdev); |
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error: |
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kfree_skb(skb); |
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} |
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} |
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} |
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void hci_read_supported_codecs(struct hci_dev *hdev) |
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{ |
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struct sk_buff *skb; |
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struct hci_rp_read_local_supported_codecs *rp; |
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struct hci_std_codecs *std_codecs; |
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struct hci_vnd_codecs *vnd_codecs; |
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struct hci_op_read_local_codec_caps caps; |
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__u8 i; |
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skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODECS, 0, NULL, |
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HCI_CMD_TIMEOUT); |
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if (IS_ERR(skb)) { |
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bt_dev_err(hdev, "Failed to read local supported codecs (%ld)", |
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PTR_ERR(skb)); |
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return; |
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} |
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if (skb->len < sizeof(*rp)) |
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goto error; |
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rp = (void *)skb->data; |
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if (rp->status) |
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goto error; |
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skb_pull(skb, sizeof(rp->status)); |
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std_codecs = (void *)skb->data; |
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/* validate codecs length before accessing */ |
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if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num) |
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+ sizeof(std_codecs->num)) |
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goto error; |
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/* enumerate codec capabilities of standard codecs */ |
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memset(&caps, 0, sizeof(caps)); |
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for (i = 0; i < std_codecs->num; i++) { |
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caps.id = std_codecs->codec[i]; |
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caps.direction = 0x00; |
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hci_read_codec_capabilities(hdev, LOCAL_CODEC_ACL_MASK, &caps); |
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} |
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skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num) |
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+ sizeof(std_codecs->num)); |
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vnd_codecs = (void *)skb->data; |
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/* validate vendor codecs length before accessing */ |
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if (skb->len < |
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flex_array_size(vnd_codecs, codec, vnd_codecs->num) |
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+ sizeof(vnd_codecs->num)) |
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goto error; |
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/* enumerate vendor codec capabilities */ |
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for (i = 0; i < vnd_codecs->num; i++) { |
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caps.id = 0xFF; |
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caps.cid = vnd_codecs->codec[i].cid; |
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caps.vid = vnd_codecs->codec[i].vid; |
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caps.direction = 0x00; |
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hci_read_codec_capabilities(hdev, LOCAL_CODEC_ACL_MASK, &caps); |
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} |
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error: |
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kfree_skb(skb); |
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} |
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void hci_read_supported_codecs_v2(struct hci_dev *hdev) |
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{ |
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struct sk_buff *skb; |
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struct hci_rp_read_local_supported_codecs_v2 *rp; |
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struct hci_std_codecs_v2 *std_codecs; |
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struct hci_vnd_codecs_v2 *vnd_codecs; |
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struct hci_op_read_local_codec_caps caps; |
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__u8 i; |
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skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODECS_V2, 0, NULL, |
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HCI_CMD_TIMEOUT); |
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if (IS_ERR(skb)) { |
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bt_dev_err(hdev, "Failed to read local supported codecs (%ld)", |
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PTR_ERR(skb)); |
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return; |
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} |
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if (skb->len < sizeof(*rp)) |
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goto error; |
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rp = (void *)skb->data; |
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if (rp->status) |
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goto error; |
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skb_pull(skb, sizeof(rp->status)); |
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std_codecs = (void *)skb->data; |
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/* check for payload data length before accessing */ |
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if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num) |
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+ sizeof(std_codecs->num)) |
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goto error; |
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memset(&caps, 0, sizeof(caps)); |
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for (i = 0; i < std_codecs->num; i++) { |
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caps.id = std_codecs->codec[i].id; |
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hci_read_codec_capabilities(hdev, std_codecs->codec[i].transport, |
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&caps); |
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} |
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skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num) |
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+ sizeof(std_codecs->num)); |
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vnd_codecs = (void *)skb->data; |
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/* check for payload data length before accessing */ |
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if (skb->len < |
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flex_array_size(vnd_codecs, codec, vnd_codecs->num) |
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+ sizeof(vnd_codecs->num)) |
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goto error; |
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for (i = 0; i < vnd_codecs->num; i++) { |
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caps.id = 0xFF; |
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caps.cid = vnd_codecs->codec[i].cid; |
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caps.vid = vnd_codecs->codec[i].vid; |
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hci_read_codec_capabilities(hdev, vnd_codecs->codec[i].transport, |
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&caps); |
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} |
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error: |
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kfree_skb(skb); |
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}
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