[PATCH v3 2/5] media: uvcvideo: Use uvc_warn_once when it make sense

[Ricardo Ribalda <ribalda@chromium.org>]

If there are multiple cameras in the system affected by a compliance
error now we only show an error message for one of them.

Use uvc_warn_once() to print an error message per device.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/media/usb/uvc/uvc_video.c | 2 +-
 drivers/media/usb/uvc/uvcvideo.h  | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index fc3536a4399f..2a3b7431cc68 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -95,7 +95,7 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
 	 */
 	if (ret > 0 && query != UVC_GET_INFO) {
 		memset(data + ret, 0, size - ret);
-		dev_warn_once(&dev->intf->dev,
+		uvc_warn_once(dev, UVC_WARN_QUERY_CTRL,
 			      "UVC non compliance: %s control %u on unit %u returned %d bytes when we expected %u.\n",
 			      uvc_query_name(query), cs, unit, ret, size);
 		return 0;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index a80406f20beb..abcafd929c9e 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -661,6 +661,7 @@ static inline struct uvc_fh *to_uvc_fh(struct file *filp)
 #define UVC_WARN_MINMAX		0
 #define UVC_WARN_PROBE_DEF	1
 #define UVC_WARN_XU_GET_RES	2
+#define UVC_WARN_QUERY_CTRL	3
 
 extern unsigned int uvc_clock_param;
 extern unsigned int uvc_no_drop_param;

-- 
2.55.0.1007.g17ff1f9808-goog