[PATCH 5/5] media: davinci: vpif_capture: fix the check on suspend/resume callbacks

From: Lad, Prabhakar
Date: Sat Sep 06 2014 - 11:28:27 EST


It is possible to call STREAMON without having any buffers queued.
So vb2_is_streaming() can return true without start_streaming()
having been called. Only after at least one buffer has been
queued will start_streaming be called.

The check vb2_is_streaming() is incorrect as this would start
the DMA without having proper DMA pointers set up. this patch
uses vb2_start_streaming_called() instead to check is streaming
was called.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx>
---
drivers/media/platform/davinci/vpif_capture.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index 881efcd..3ccb26f 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -1596,7 +1596,7 @@ static int vpif_suspend(struct device *dev)
ch = vpif_obj.dev[i];
common = &ch->common[VPIF_VIDEO_INDEX];

- if (!vb2_is_streaming(&common->buffer_queue))
+ if (!vb2_start_streaming_called(&common->buffer_queue))
continue;

mutex_lock(&common->lock);
@@ -1630,7 +1630,7 @@ static int vpif_resume(struct device *dev)
ch = vpif_obj.dev[i];
common = &ch->common[VPIF_VIDEO_INDEX];

- if (!vb2_is_streaming(&common->buffer_queue))
+ if (!vb2_start_streaming_called(&common->buffer_queue))
continue;

mutex_lock(&common->lock);
--
1.9.1

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