diff options
| author | Paul Mackerras <paulus@samba.org> | 2008-01-31 01:25:51 +0100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-01-31 01:25:51 +0100 |
| commit | bd45ac0c5daae35e7c71138172e63df5cf644cf6 (patch) | |
| tree | 5eb5a599bf6a9d7a8a34e802db932aa9e9555de4 /drivers/spi/spi.c | |
| parent | Merge branch 'for-2.6.25' of git://git.secretlab.ca/git/linux-2.6-mpc52xx (diff) | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog (diff) | |
| download | linux-bd45ac0c5daae35e7c71138172e63df5cf644cf6.tar.xz linux-bd45ac0c5daae35e7c71138172e63df5cf644cf6.zip | |
Merge branch 'linux-2.6'
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 93e9de46977a..682a6a48fec3 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -485,6 +485,15 @@ void spi_unregister_master(struct spi_master *master) } EXPORT_SYMBOL_GPL(spi_unregister_master); +static int __spi_master_match(struct device *dev, void *data) +{ + struct spi_master *m; + u16 *bus_num = data; + + m = container_of(dev, struct spi_master, dev); + return m->bus_num == *bus_num; +} + /** * spi_busnum_to_master - look up master associated with bus_num * @bus_num: the master's bus number @@ -499,17 +508,12 @@ struct spi_master *spi_busnum_to_master(u16 bus_num) { struct device *dev; struct spi_master *master = NULL; - struct spi_master *m; - - down(&spi_master_class.sem); - list_for_each_entry(dev, &spi_master_class.children, node) { - m = container_of(dev, struct spi_master, dev); - if (m->bus_num == bus_num) { - master = spi_master_get(m); - break; - } - } - up(&spi_master_class.sem); + + dev = class_find_device(&spi_master_class, &bus_num, + __spi_master_match); + if (dev) + master = container_of(dev, struct spi_master, dev); + /* reference got in class_find_device */ return master; } EXPORT_SYMBOL_GPL(spi_busnum_to_master); |