V4L/DVB (5089): Pvrusb2: V4L EXT_CTRLS fixup
Attempts to enumerate or operate on a group of EXT_CTRLS where the
group size is zero is OK; don't fail on such operations. At least one
application uses this to probe for the existence of this API so let it
succeed.
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
index 5b1260c..91c4225 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
@@ -636,6 +636,7 @@
struct v4l2_ext_control *ctrl;
unsigned int idx;
int val;
+ ret = 0;
for (idx = 0; idx < ctls->count; idx++) {
ctrl = ctls->controls + idx;
ret = pvr2_ctrl_get_value(
@@ -658,6 +659,7 @@
(struct v4l2_ext_controls *)arg;
struct v4l2_ext_control *ctrl;
unsigned int idx;
+ ret = 0;
for (idx = 0; idx < ctls->count; idx++) {
ctrl = ctls->controls + idx;
ret = pvr2_ctrl_set_value(
@@ -680,6 +682,7 @@
unsigned int idx;
/* For the moment just validate that the requested control
actually exists. */
+ ret = 0;
for (idx = 0; idx < ctls->count; idx++) {
ctrl = ctls->controls + idx;
pctl = pvr2_hdw_get_ctrl_v4l(hdw,ctrl->id);