diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2012-10-15 13:07:31 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-22 12:43:37 -0700 |
| commit | 0a7717dfe097d7a0a08e824ed39547c3e6e9d7e8 (patch) | |
| tree | b9a9314a96cda75e3484d1cadc82a8e3b3cf8a12 /drivers/staging | |
| parent | 7f2f7e050bea242735880b7876d9771efb580213 (diff) | |
| download | linux-0a7717dfe097d7a0a08e824ed39547c3e6e9d7e8.tar.bz2 | |
staging: comedi: avoid a put_device(), get_device() sequence
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@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/comedi/comedidev.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index cb67a5cb9c82..100ea0b0772c 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); |