diff options
| author | Simon Farnsworth <simon.farnsworth@onelan.co.uk> | 2011-09-05 12:23:12 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-09-18 08:03:39 -0300 |
| commit | 09fc9802c31a9358a4e34642aa5f569111752879 (patch) | |
| tree | b07a8c6e035df000702b3f2bbfaeb8acd85418d6 /drivers/media/video/cx18/cx18-ioctl.c | |
| parent | 16e3d2f4fab6e001a79705fa273418afc10188f8 (diff) | |
[media] cx18: Fix videobuf capture
When we moved to 3.0, we found that the cx18 driver was oopsing on close with:
NULL pointer deref at:
[ 2290.461009] Call Trace:
[ 2290.461009] [<c046007b>] ? pm_qos_add_request+0xc/0x6e
[ 2290.461009] [<c082631c>] __mutex_lock_common+0x87/0x125
[ 2290.461009] [<f8970e92>] ? cx18_queue_flush+0x31/0x87 [cx18]
[ 2290.461009] [<c0436b85>] ? __might_sleep+0x29/0xe4
[ 2290.461009] [<c0826515>] __mutex_lock_slowpath+0x25/0x27
[ 2290.461009] [<c08264b2>] ? mutex_lock+0x2e/0x3b
[ 2290.461009] [<c08264b2>] mutex_lock+0x2e/0x3b
[ 2290.461009] [<f88d3137>] videobuf_queue_lock+0x13/0x15 [videobuf_core]
[ 2290.461009] [<f88d3f86>] __videobuf_free+0xfc/0x112 [videobuf_core]
[ 2290.461009] [<f89741e6>] cx18_v4l2_close+0x158/0x172 [cx18]
[ 2290.461009] [<c0507522>] ? cpumask_next+0x1a/0x1d
[ 2290.461009] [<f88a319d>] v4l2_release+0x35/0x52 [videodev]
[ 2290.461009] [<c04f5717>] fput+0x100/0x1a5
[ 2290.461009] [<c04f2e09>] filp_close+0x5c/0x64
[ 2290.461009] [<c04f2e70>] sys_close+0x5f/0x93
[ 2290.461009] [<c082cd5f>] sysenter_do_call+0x12/0x28
Some digging showed that a merge at some previous point partially
added broken mmap() support, causing this trace. Remove the broken
code completely.
On top of that, the calculation in place for "buffer full" depended on
UYUV instead of HM12, while our GStreamer code was picking HM12 in
some circumstances.
Finally, the V4L2_CAP_STREAMING capability was never exposed. Patch it
into the YUV encoder node only.
Signed-off-by: Simon Farnsworth <simon.farnsworth@onelan.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx18/cx18-ioctl.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-ioctl.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/media/video/cx18/cx18-ioctl.c b/drivers/media/video/cx18/cx18-ioctl.c index afe0a29e7200..66b1c15c3541 100644 --- a/drivers/media/video/cx18/cx18-ioctl.c +++ b/drivers/media/video/cx18/cx18-ioctl.c @@ -160,12 +160,7 @@ static int cx18_g_fmt_vid_cap(struct file *file, void *fh, pixfmt->priv = 0; if (id->type == CX18_ENC_STREAM_TYPE_YUV) { pixfmt->pixelformat = s->pixelformat; - /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2))) - UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */ - if (s->pixelformat == V4L2_PIX_FMT_HM12) - pixfmt->sizeimage = pixfmt->height * 720 * 3 / 2; - else - pixfmt->sizeimage = pixfmt->height * 720 * 2; + pixfmt->sizeimage = s->vb_bytes_per_frame; pixfmt->bytesperline = 720; } else { pixfmt->pixelformat = V4L2_PIX_FMT_MPEG; @@ -296,6 +291,12 @@ static int cx18_s_fmt_vid_cap(struct file *file, void *fh, return -EBUSY; s->pixelformat = fmt->fmt.pix.pixelformat; + /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2))) + UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */ + if (s->pixelformat == V4L2_PIX_FMT_HM12) + s->vb_bytes_per_frame = h * 720 * 3 / 2; + else + s->vb_bytes_per_frame = h * 720 * 2; mbus_fmt.width = cx->cxhdl.width = w; mbus_fmt.height = cx->cxhdl.height = h; @@ -463,13 +464,16 @@ static int cx18_s_register(struct file *file, void *fh, static int cx18_querycap(struct file *file, void *fh, struct v4l2_capability *vcap) { - struct cx18 *cx = fh2id(fh)->cx; + struct cx18_open_id *id = fh2id(fh); + struct cx18 *cx = id->cx; strlcpy(vcap->driver, CX18_DRIVER_NAME, sizeof(vcap->driver)); strlcpy(vcap->card, cx->card_name, sizeof(vcap->card)); snprintf(vcap->bus_info, sizeof(vcap->bus_info), "PCI:%s", pci_name(cx->pci_dev)); vcap->capabilities = cx->v4l2_cap; /* capabilities */ + if (id->type == CX18_ENC_STREAM_TYPE_YUV) + vcap->capabilities |= V4L2_CAP_STREAMING; return 0; } |