From: Dave Young Date: Tue, 22 Jan 2008 07:14:18 +0000 (+0800) Subject: spi: use class iteration api X-Git-Tag: v2.6.25-rc1~1243^2~4 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=5ed2c832ed256b18d90c2462369c62fd79312e6c;p=linux-2.6-omap-h63xx.git spi: use class iteration api Convert to use the class iteration api. Signed-off-by: Dave Young Acked-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 93e9de46977..682a6a48fec 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);