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staging: comedi: ni_660x: fix memory barrier without comment

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Fix the checkpatch.pl issue. Move the memory barrier to a better place.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2016-03-22 11:10:37 -07:00 committed by Greg Kroah-Hartman
parent e8f6e2b98d
commit 5262d035ef
1 changed files with 3 additions and 1 deletions
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4
drivers/staging/comedi/drivers/ni_660x.c
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@ -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)