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media: uvcvideo: Include streaming interface number in debugfs dir name 

uvcvideo creates a debugfs directory based on the device bus number and
device number. If a device contains more than one uvc function, the
creation of the second and following debugfs directories will fail and
print an info message like this:
  "uvcvideo: Unable to create debugfs 3-2 directory."

This patch includes the uvc streaming interface number in the debugfs
directory name, to make sure it is unique. The directory name format is
changed from "<busnum>-<devnum>" to "<busnum>-<devnum>-<intfnum>"

Signed-off-by: Torleiv Sundre <torleiv@huddly.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Torleiv Sundre 2019-04-28 01:21:13 -04:00 committed by Mauro Carvalho Chehab
parent 5800571960
commit 675e2f20b1
1 changed files with 3 additions and 2 deletions
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5
drivers/media/usb/uvc/uvc_debugfs.c
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@ -74,12 +74,13 @@ void uvc_debugfs_init_stream(struct uvc_streaming *stream)
{
struct usb_device *udev = stream->dev->udev;
struct dentry *dent;
char dir_name[32];
char dir_name[33];
if (uvc_debugfs_root_dir == NULL)
return;
sprintf(dir_name, "%u-%u", udev->bus->busnum, udev->devnum);
snprintf(dir_name, sizeof(dir_name), "%u-%u-%u", udev->bus->busnum,
udev->devnum, stream->intfnum);
dent = debugfs_create_dir(dir_name, uvc_debugfs_root_dir);
if (IS_ERR_OR_NULL(dent)) {