In `comedi_set_hw_dev()`, if there is no change to `dev->hw_dev` (and it
is not `NULL`), don't bother putting and getting the device.
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
drivers/staging/comedi/comedidev.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index cb67a5c..100ea0b 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -436,9 +436,10 @@ into comedi's buffer */
static inline void comedi_set_hw_dev(struct comedi_device *dev,
struct device *hw_dev)
{
+ if (dev->hw_dev == hw_dev)
+ return;
if (dev->hw_dev)
put_device(dev->hw_dev);
-
dev->hw_dev = hw_dev;
if (dev->hw_dev) {
dev->hw_dev = get_device(dev->hw_dev);
--
1.7.12
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