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 <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/pcmuio.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcmuio.c
b/drivers/staging/comedi/drivers/pcmuio.c
index 6ee876d..c83f5bd 100644
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -128,8 +128,8 @@ static const struct pcmuio_board pcmuio_boards[] = {
};
struct pcmuio_asic {
- spinlock_t pagelock;
- spinlock_t spinlock;
+ spinlock_t pagelock; /* protects the page registers */
+ spinlock_t spinlock; /* protects member variables */
int enabled_mask;
int active;
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,
struct comedi_subdevice *s)
{
@@ -403,6 +404,7 @@ static irqreturn_t pcmuio_interrupt(int irq, void *d)
return handled ? IRQ_HANDLED : IRQ_NONE;
}
+/* chip->spinlock is already locked */
static int pcmuio_start_intr(struct comedi_device *dev,
struct comedi_subdevice *s)
{
--
1.8.4.4
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