[media] gspca: fix dev_open() error path
If v4l2_fh_open() fails in dev_open(), gspca_dev->module left locked.
The patch adds module_put(gspca_dev->module) on this path.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c
index b7ae872..048507b 100644
--- a/drivers/media/usb/gspca/gspca.c
+++ b/drivers/media/usb/gspca/gspca.c
@@ -1266,6 +1266,7 @@
static int dev_open(struct file *file)
{
struct gspca_dev *gspca_dev = video_drvdata(file);
+ int ret;
PDEBUG(D_STREAM, "[%s] open", current->comm);
@@ -1273,7 +1274,10 @@
if (!try_module_get(gspca_dev->module))
return -ENODEV;
- return v4l2_fh_open(file);
+ ret = v4l2_fh_open(file);
+ if (ret)
+ module_put(gspca_dev->module);
+ return ret;
}
static int dev_close(struct file *file)