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[media] omap3isp: Assume media_entity_pipeline_start may fail

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Since media_entity_pipeline_start() now does link validation, it may
actually fail. Perform the error handling.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sakari Ailus 2011-10-10 17:05:24 -03:00 committed by Mauro Carvalho Chehab
parent b0cd79ed98
commit da39257f0b
1 changed files with 28 additions and 24 deletions
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40
drivers/media/video/omap3isp/ispvideo.c
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@ -1002,14 +1002,16 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]);
pipe->max_rate = pipe->l3_ick;
media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
if (ret < 0)
goto err_pipeline_start;
/* Verify that the currently configured format matches the output of
* the connected subdev.
*/
ret = isp_video_check_format(video, vfh);
if (ret < 0)
goto error;
goto err_check_format;
video->bpl_padding = ret;
video->bpl_value = vfh->format.fmt.pix.bytesperline;
@ -1026,7 +1028,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
} else {
if (far_end == NULL) {
ret = -EPIPE;
goto error;
goto err_check_format;
}
state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT;
@ -1037,7 +1039,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
/* Validate the pipeline and update its state. */
ret = isp_video_validate_pipeline(pipe);
if (ret < 0)
goto error;
goto err_check_format;
pipe->error = false;
@ -1059,7 +1061,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
ret = omap3isp_video_queue_streamon(&vfh->queue);
if (ret < 0)
goto error;
goto err_check_format;
/* In sensor-to-memory mode, the stream can be started synchronously
* to the stream on command. In memory-to-memory mode, it will be
@ -1069,32 +1071,34 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
ret = omap3isp_pipeline_set_stream(pipe,
ISP_PIPELINE_STREAM_CONTINUOUS);
if (ret < 0)
goto error;
goto err_set_stream;
spin_lock_irqsave(&video->queue->irqlock, flags);
if (list_empty(&video->dmaqueue))
video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN;
spin_unlock_irqrestore(&video->queue->irqlock, flags);
}
error:
if (ret < 0) {
video->streaming = 1;
mutex_unlock(&video->stream_lock);
return 0;
err_set_stream:
omap3isp_video_queue_streamoff(&vfh->queue);
err_check_format:
media_entity_pipeline_stop(&video->video.entity);
err_pipeline_start:
if (video->isp->pdata->set_constraints)
video->isp->pdata->set_constraints(video->isp, false);
/* The DMA queue must be emptied here, otherwise CCDC interrupts
* that will get triggered the next time the CCDC is powered up
* will try to access buffers that might have been freed but
* still present in the DMA queue. This can easily get triggered
* if the above omap3isp_pipeline_set_stream() call fails on a
* system with a free-running sensor.
/* The DMA queue must be emptied here, otherwise CCDC interrupts that
* will get triggered the next time the CCDC is powered up will try to
* access buffers that might have been freed but still present in the
* DMA queue. This can easily get triggered if the above
* omap3isp_pipeline_set_stream() call fails on a system with a
* free-running sensor.
*/
INIT_LIST_HEAD(&video->dmaqueue);
video->queue = NULL;
}
if (!ret)
video->streaming = 1;
mutex_unlock(&video->stream_lock);
return ret;