Fix the checkpatch.pl issue. Move the memory barrier to a better place.
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/ni_660x.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/drivers/ni_660x.c
b/drivers/staging/comedi/drivers/ni_660x.c
index 2926d26..bb5b5ff 100644
--- a/drivers/staging/comedi/drivers/ni_660x.c
+++ b/drivers/staging/comedi/drivers/ni_660x.c
@@ -613,9 +613,11 @@ static irqreturn_t ni_660x_interrupt(int irq, void *d)
if (!dev->attached)
return IRQ_NONE;
+ /* make sure dev->attached is checked before doing anything else */
+ smp_mb();
+
/* lock to avoid race with comedi_poll */
spin_lock_irqsave(&devpriv->interrupt_lock, flags);
- smp_mb();
for (i = 0; i < dev->n_subdevices; ++i) {
s = &dev->subdevices[i];
if (s->type == COMEDI_SUBD_COUNTER)
--
2.6.3
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