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-rw-r--r--drivers/media/video/uvc/uvc_video.c19
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c
index b7160b15e780..6d0ac3be8191 100644
--- a/drivers/media/video/uvc/uvc_video.c
+++ b/drivers/media/video/uvc/uvc_video.c
@@ -368,7 +368,7 @@ static int uvc_video_decode_start(struct uvc_video_device *video,
368 368
369 /* Synchronize to the input stream by waiting for the FID bit to be 369 /* Synchronize to the input stream by waiting for the FID bit to be
370 * toggled when the the buffer state is not UVC_BUF_STATE_ACTIVE. 370 * toggled when the the buffer state is not UVC_BUF_STATE_ACTIVE.
371 * queue->last_fid is initialized to -1, so the first isochronous 371 * video->last_fid is initialized to -1, so the first isochronous
372 * frame will always be in sync. 372 * frame will always be in sync.
373 * 373 *
374 * If the device doesn't toggle the FID bit, invert video->last_fid 374 * If the device doesn't toggle the FID bit, invert video->last_fid
@@ -395,7 +395,7 @@ static int uvc_video_decode_start(struct uvc_video_device *video,
395 * last payload can be lost anyway). We thus must check if the FID has 395 * last payload can be lost anyway). We thus must check if the FID has
396 * been toggled. 396 * been toggled.
397 * 397 *
398 * queue->last_fid is initialized to -1, so the first isochronous 398 * video->last_fid is initialized to -1, so the first isochronous
399 * frame will never trigger an end of frame detection. 399 * frame will never trigger an end of frame detection.
400 * 400 *
401 * Empty buffers (bytesused == 0) don't trigger end of frame detection 401 * Empty buffers (bytesused == 0) don't trigger end of frame detection
@@ -512,7 +512,7 @@ static void uvc_video_decode_bulk(struct urb *urb,
512 /* If the URB is the first of its payload, decode and save the 512 /* If the URB is the first of its payload, decode and save the
513 * header. 513 * header.
514 */ 514 */
515 if (video->bulk.header_size == 0) { 515 if (video->bulk.header_size == 0 && !video->bulk.skip_payload) {
516 do { 516 do {
517 ret = uvc_video_decode_start(video, buf, mem, len); 517 ret = uvc_video_decode_start(video, buf, mem, len);
518 if (ret == -EAGAIN) 518 if (ret == -EAGAIN)
@@ -522,14 +522,13 @@ static void uvc_video_decode_bulk(struct urb *urb,
522 /* If an error occured skip the rest of the payload. */ 522 /* If an error occured skip the rest of the payload. */
523 if (ret < 0 || buf == NULL) { 523 if (ret < 0 || buf == NULL) {
524 video->bulk.skip_payload = 1; 524 video->bulk.skip_payload = 1;
525 return; 525 } else {
526 } 526 memcpy(video->bulk.header, mem, ret);
527 video->bulk.header_size = ret;
527 528
528 video->bulk.header_size = ret; 529 mem += ret;
529 memcpy(video->bulk.header, mem, video->bulk.header_size); 530 len -= ret;
530 531 }
531 mem += ret;
532 len -= ret;
533 } 532 }
534 533
535 /* The buffer queue might have been cancelled while a bulk transfer 534 /* The buffer queue might have been cancelled while a bulk transfer