The timer is only started by the ai subdevice in das16_cmd_exec()
and this function can only be called if the device is attached.
Remove the unnecessary sanity check.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/das16.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)
diff --git a/drivers/staging/comedi/drivers/das16.c
b/drivers/staging/comedi/drivers/das16.c
index cd2fa4c..df7bf1e 100644
--- a/drivers/staging/comedi/drivers/das16.c
+++ b/drivers/staging/comedi/drivers/das16.c
@@ -350,21 +350,14 @@ static int disable_dma_on_even(struct comedi_device *dev)
static void das16_interrupt(struct comedi_device *dev)
{
struct das16_private_struct *devpriv = dev->private;
- unsigned long dma_flags, spin_flags;
struct comedi_subdevice *s = dev->read_subdev;
- struct comedi_async *async;
- struct comedi_cmd *cmd;
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+ unsigned long spin_flags;
+ unsigned long dma_flags;
int num_bytes, residue;
int buffer_index;
- if (!dev->attached) {
- comedi_error(dev, "premature interrupt");
- return;
- }
- /* initialize async here to make sure it is not NULL */
- async = s->async;
- cmd = &async->cmd;
-
spin_lock_irqsave(&dev->spinlock, spin_flags);
if ((devpriv->ctrl_reg & DMA_ENABLE) == 0) {
spin_unlock_irqrestore(&dev->spinlock, spin_flags);
--
1.8.3.2
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