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media: uvcvideo: Constify descriptor buffers

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There is no need to modify the content of UVC descriptor buffers during
parsing. Make all the corresponding pointers const to avoid unintended
modifications.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Laurent Pinchart 2023-04-20 06:47:57 +03:00 committed by Mauro Carvalho Chehab
parent af621ba2ed
commit 102df33eba
1 changed files with 3 additions and 3 deletions
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6
drivers/media/usb/uvc/uvc_driver.c
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@ -221,7 +221,7 @@ static struct uvc_streaming *uvc_stream_new(struct uvc_device *dev,
static int uvc_parse_format(struct uvc_device *dev,
struct uvc_streaming *streaming, struct uvc_format *format,
struct uvc_frame *frames, u32 **intervals, unsigned char *buffer,
struct uvc_frame *frames, u32 **intervals, const unsigned char *buffer,
int buflen)
{
struct usb_interface *intf = streaming->intf;
@ -513,7 +513,7 @@ static int uvc_parse_streaming(struct uvc_device *dev,
struct uvc_format *format;
struct uvc_frame *frame;
struct usb_host_interface *alts = &intf->altsetting[0];
unsigned char *_buffer, *buffer = alts->extra;
const unsigned char *_buffer, *buffer = alts->extra;
int _buflen, buflen = alts->extralen;
unsigned int nformats = 0, nframes = 0, nintervals = 0;
unsigned int size, i, n, p;
@ -1166,7 +1166,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
static int uvc_parse_control(struct uvc_device *dev)
{
struct usb_host_interface *alts = dev->intf->cur_altsetting;
unsigned char *buffer = alts->extra;
const unsigned char *buffer = alts->extra;
int buflen = alts->extralen;
int ret;