diff options
| -rw-r--r-- | drivers/media/video/pwc/pwc-v4l.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c index aa87e462a95..f85c51249c7 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"); |