From b3f18ec666082dd406d39871dd9bd14d736177ef Mon Sep 17 00:00:00 2001 From: Antonio Ospite Date: Wed, 9 Mar 2016 13:03:18 -0300 Subject: [PATCH] [media] gspca: fix a v4l2-compliance failure about VIDIOC_ENUM_FRAMEINTERVALS According to v4l2-compliance VIDIOC_ENUM_FRAMEINTERVALS should fail for unsupported frame sizes, but gspca is too tolerant and tries to find the frame intervals for the frame size nearest to the requested one. This makes v4l2-compliance fail with this message: fail: v4l2-test-formats.cpp(123): \ found frame intervals for invalid size 321x240 test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: FAIL Fix this by using an exact match for the frame size when enumerating frame intervals, and retuning an error if the frame size for which the frame intervals have been asked is not supported. Signed-off-by: Antonio Ospite Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/gspca/gspca.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c index 1bb7901a128c..61cb16d6c988 100644 --- a/drivers/media/usb/gspca/gspca.c +++ b/drivers/media/usb/gspca/gspca.c @@ -991,6 +991,19 @@ static void gspca_set_default_mode(struct gspca_dev *gspca_dev) v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); } +static int wxh_to_mode(struct gspca_dev *gspca_dev, + int width, int height) +{ + int i; + + for (i = 0; i < gspca_dev->cam.nmodes; i++) { + if (width == gspca_dev->cam.cam_mode[i].width + && height == gspca_dev->cam.cam_mode[i].height) + return i; + } + return -EINVAL; +} + static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev, int width, int height) { @@ -1233,9 +1246,13 @@ static int vidioc_enum_frameintervals(struct file *filp, void *priv, struct v4l2_frmivalenum *fival) { struct gspca_dev *gspca_dev = video_drvdata(filp); - int mode = wxh_to_nearest_mode(gspca_dev, fival->width, fival->height); + int mode; __u32 i; + mode = wxh_to_mode(gspca_dev, fival->width, fival->height); + if (mode < 0) + return -EINVAL; + if (gspca_dev->cam.mode_framerates == NULL || gspca_dev->cam.mode_framerates[mode].nrates == 0) return -EINVAL;