From 6588687a602ee5d97aad92a5910db1be16a4f6df Mon Sep 17 00:00:00 2001
From: Jean-Francois Moine <moinejf@free.fr>
Date: Sun, 27 Mar 2011 04:11:48 -0300
Subject: [PATCH] [media] pwc: Handle V4L2_CTRL_FLAG_NEXT_CTRL in queryctrl
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Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/media/video/pwc/pwc-v4l.c | 23 +++++++++++++++++++++--
1 file changed, 21 insertions(+), 2 deletions(-)
diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c
index aa87e462a958..f85c51249c7b 100644
--- a/drivers/media/video/pwc/pwc-v4l.c
+++ b/drivers/media/video/pwc/pwc-v4l.c
@@ -379,8 +379,27 @@ static int pwc_s_input(struct file *file, void *fh, unsigned int i)
static int pwc_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *c)
{
- int i;
-
+ int i, idx;
+ u32 id;
+
+ id = c->id;
+ if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
+ id &= V4L2_CTRL_ID_MASK;
+ id++;
+ idx = -1;
+ for (i = 0; i < ARRAY_SIZE(pwc_controls); i++) {
+ if (pwc_controls[i].id < id)
+ continue;
+ if (idx >= 0
+ && pwc_controls[i].id > pwc_controls[idx].id)
+ continue;
+ idx = i;
+ }
+ if (idx < 0)
+ return -EINVAL;
+ memcpy(c, &pwc_controls[idx], sizeof pwc_controls[0]);
+ return 0;
+ }
for (i = 0; i < sizeof(pwc_controls) / sizeof(struct v4l2_queryctrl); i++) {
if (pwc_controls[i].id == c->id) {
PWC_DEBUG_IOCTL("ioctl(VIDIOC_QUERYCTRL) found\n");
--
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