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V4L/DVB (11263): gspca: Stop setting buffer type, and avoid memset in querycap 

The v4l2-ioctl core checks the buffer type now by only allowing buffer
types for which the corresponding ->vidioc_try_fmt_xxx() methods are
defined.

This driver only defines ->vidioc_try_fmt_vid_cap() so only VIDEO_CAPTURE
buffers are allowed to be used with vidioc_g_parm.  Also,
->vidioc_enum_fmt_vid_cap() is only called for VIDEO_CAPTURE buffers.
There is no need to set the buffer type since it must already be the
correct value.

The struct which ->vidioc_querycap() is supposed to fill in is already
zeroed so it's not necessary to call memset on it.

Cc: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Trent Piepho 2009-03-28 22:25:35 -03:00 committed by Mauro Carvalho Chehab
parent 601bc29845
commit 5a27578667
1 changed files with 0 additions and 4 deletions
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4
drivers/media/video/gspca/gspca.c
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@ -765,7 +765,6 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
fmtdesc->pixelformat = fmt_tb[index];
if (gspca_is_compressed(fmt_tb[index]))
fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
@ -962,8 +961,6 @@ static int vidioc_querycap(struct file *file, void *priv,
struct gspca_dev *gspca_dev = priv;
int ret;
memset(cap, 0, sizeof *cap);
/* protect the access to the usb device */
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
@ -1341,7 +1338,6 @@ static int vidioc_g_parm(struct file *filp, void *priv,
{
struct gspca_dev *gspca_dev = priv;
parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
parm->parm.capture.readbuffers = gspca_dev->nbufread;
if (gspca_dev->sd_desc->get_streamparm) {