[PATCH 2/4] mx2_camera: return IRQ_NONE when doing nothing

[Baruch Siach]

Signed-off-by: Baruch Siach <bar...@tkos.co.il>
---
 drivers/media/video/mx2_camera.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
index 1536bd4..b42ad8d 100644
--- a/drivers/media/video/mx2_camera.c
+++ b/drivers/media/video/mx2_camera.c
@@ -420,15 +420,17 @@ static irqreturn_t mx25_camera_irq(int irq_csi, void 
*data)
        struct mx2_camera_dev *pcdev = data;
        u32 status = readl(pcdev->base_csi + CSISR);
 
-       if (status & CSISR_DMA_TSF_FB1_INT)
+       writel(status, pcdev->base_csi + CSISR);
+
+       if (!(status & (CSISR_DMA_TSF_FB1_INT | CSISR_DMA_TSF_FB2_INT)))
+               return IRQ_NONE;
+       else if (status & CSISR_DMA_TSF_FB1_INT)
                mx25_camera_frame_done(pcdev, 1, VIDEOBUF_DONE);
        else if (status & CSISR_DMA_TSF_FB2_INT)
                mx25_camera_frame_done(pcdev, 2, VIDEOBUF_DONE);
 
        /* FIXME: handle CSISR_RFF_OR_INT */
 
-       writel(status, pcdev->base_csi + CSISR);
-
        return IRQ_HANDLED;
 }
 
-- 
1.7.1

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