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ALSA: usb-audio: Use flexible allocation for FCP packets

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Allocate FCP request and response packets with kmalloc_flex() for
the trailing packet data instead of passing the computed struct size
directly to kmalloc().

Keep the computed packet sizes for the USB transfer length checks.

Assisted-by: Codex:GPT-5.5
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260519004834.627676-1-rosenp@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Rosen Penev 2026-05-18 17:48:34 -07:00 committed by Takashi Iwai
parent 2c515c221a
commit cce8ec8209
1 changed files with 2 additions and 2 deletions
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4
sound/usb/fcp.c
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@ -191,13 +191,13 @@ static int fcp_usb(struct usb_mixer_interface *mixer, u32 opcode,
struct fcp_usb_packet *req __free(kfree) = NULL;
size_t req_buf_size = struct_size(req, data, req_size);
req = kmalloc(req_buf_size, GFP_KERNEL);
req = kmalloc_flex(*req, data, req_size);
if (!req)
return -ENOMEM;
struct fcp_usb_packet *resp __free(kfree) = NULL;
size_t resp_buf_size = struct_size(resp, data, resp_size);
resp = kmalloc(resp_buf_size, GFP_KERNEL);
resp = kmalloc_flex(*resp, data, resp_size);
if (!resp)
return -ENOMEM;