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staging: comedi: pcmuio: document the spinlock_t variables

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Add some comments about the two spinlock_t variables in the private
data. Also, add come comments for the functions that do not need to
lock/unlock the spinlock.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-12-05 16:54:11 -07:00 committed by Greg Kroah-Hartman
parent 4344158f3e
commit 25ad998892
1 changed files with 4 additions and 2 deletions
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6
drivers/staging/comedi/drivers/pcmuio.c
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@ -128,8 +128,8 @@ static const struct pcmuio_board pcmuio_boards[] = {
}; };
struct pcmuio_asic { struct pcmuio_asic {
spinlock_t pagelock; spinlock_t pagelock; /* protects the page registers */
spinlock_t spinlock; spinlock_t spinlock; /* protects member variables */
int enabled_mask; int enabled_mask;
int active; int active;
int stop_count; int stop_count;
@ -295,6 +295,7 @@ static void pcmuio_reset(struct comedi_device *dev)
} }
} }
/* chip->spinlock is already locked */
static void pcmuio_stop_intr(struct comedi_device *dev, static void pcmuio_stop_intr(struct comedi_device *dev,
struct comedi_subdevice *s) struct comedi_subdevice *s)
{ {
@ -403,6 +404,7 @@ static irqreturn_t pcmuio_interrupt(int irq, void *d)
return handled ? IRQ_HANDLED : IRQ_NONE; return handled ? IRQ_HANDLED : IRQ_NONE;
} }
/* chip->spinlock is already locked */
static int pcmuio_start_intr(struct comedi_device *dev, static int pcmuio_start_intr(struct comedi_device *dev,
struct comedi_subdevice *s) struct comedi_subdevice *s)
{ {