redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

media: ddbridge: use spin_lock_irqsave() in output_work()

Browse source 
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.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Daniel Scheller 2018-04-09 12:47:43 -04:00 committed by Mauro Carvalho Chehab
parent 285d490c31
commit e415eec458
1 changed files with 6 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
drivers/media/pci/ddbridge/ddbridge-core.c
View file

@ -2117,18 +2117,18 @@ 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)