[PATCH v2 10/19] [media] ddbridge: use spin_lock_irqsave() in output_work()

[Daniel Scheller]

From: Daniel Scheller <d.schel...@gmx.net>

Make sure to save IRQ states before taking the dma lock, as already done
in it's input_work() counterpart.

Picked up from the upstream dddvb-0.9.33 release.

Signed-off-by: Daniel Scheller <d.schel...@gmx.net>
---
 drivers/media/pci/ddbridge/ddbridge-core.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c 
b/drivers/media/pci/ddbridge/ddbridge-core.c
index 9d91221dacc4..c22537eceee5 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -2132,18 +2132,18 @@ static void output_work(struct work_struct *work)
        struct ddb_dma *dma = container_of(work, struct ddb_dma, work);
        struct ddb_output *output = (struct ddb_output *)dma->io;
        struct ddb *dev = output->port->dev;
+       unsigned long flags;
 
-       spin_lock(&dma->lock);
-       if (!dma->running) {
-               spin_unlock(&dma->lock);
-               return;
-       }
+       spin_lock_irqsave(&dma->lock, flags);
+       if (!dma->running)
+               goto unlock_exit;
        dma->stat = ddbreadl(dev, DMA_BUFFER_CURRENT(dma));
        dma->ctrl = ddbreadl(dev, DMA_BUFFER_CONTROL(dma));
        if (output->redi)
                output_ack_input(output, output->redi);
        wake_up(&dma->wq);
-       spin_unlock(&dma->lock);
+unlock_exit:
+       spin_unlock_irqrestore(&dma->lock, flags);
 }
 
 static void output_handler(void *data)
-- 
2.16.1