lkml.org 
[lkml]   [2008]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH 6/7] spi : use class iteration api
Update the patch with minor return path changes in match function:

Convert to use the class iteration api.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>

---
drivers/spi/spi.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)

diff -upr linux/drivers/spi/spi.c linux.new/drivers/spi/spi.c
--- linux/drivers/spi/spi.c 2008-01-16 08:43:35.000000000 +0800
+++ linux.new/drivers/spi/spi.c 2008-01-16 08:43:35.000000000 +0800
@@ -485,6 +485,15 @@ void spi_unregister_master(struct spi_ma
}
EXPORT_SYMBOL_GPL(spi_unregister_master);

+static int __spi_master_match(struct device *dev, void *data)
+{
+ struct spi_master *m;
+ u16 *bus_num = (u16 *)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(
{
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);

\
 
 \ /
  Last update: 2008-01-16 01:51    [W:0.061 / U:0.632 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site