diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2014-12-01 10:10:44 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-12-23 10:31:37 -0200 |
| commit | 17028cdb74bf8bb593aebe5550bc90325fa9af88 (patch) | |
| tree | 242c98ebc182e0fd8601b01236a71b5e2de1f7d5 /drivers/media/v4l2-core/v4l2-ioctl.c | |
| parent | 21a7e0596a63abdf12a9591c29359f7f15e18c16 (diff) | |
[media] v4l2 core: improve debug flag handling
The old debug field is renamed to dev_debug to ensure that existing drivers
(including out-of-tree drivers) that try to use the old name will no longer
compile. A comment has also been added that makes it explicit that drivers
shouldn't use this field.
Additional bits have been added to the debug flag to be more fine-grained
when debugging, especially when dealing with streaming ioctls and read,
write and poll. You want to enable those explicitly to prevent flooding
the log when streaming unless you actually want to do that.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-ioctl.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ioctl.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index faac2f4e0f3..b08407225db 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -2339,7 +2339,7 @@ static long __video_do_ioctl(struct file *file, const struct v4l2_ioctl_info *info; void *fh = file->private_data; struct v4l2_fh *vfh = NULL; - int debug = vfd->debug; + int dev_debug = vfd->dev_debug; long ret = -ENOTTY; if (ops == NULL) { @@ -2388,11 +2388,15 @@ static long __video_do_ioctl(struct file *file, } done: - if (debug) { + if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { + if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && + (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) + return ret; + v4l_printk_ioctl(video_device_node_name(vfd), cmd); if (ret < 0) pr_cont(": error %ld", ret); - if (debug == V4L2_DEBUG_IOCTL) + if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) pr_cont("\n"); else if (_IOC_DIR(cmd) == _IOC_NONE) info->debug(arg, write_only); |