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authorJonathan Corbet <corbet@lwn.net>2008-05-16 13:46:14 -0600
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:50 -0600
commit609f9e92b570f390a457a81effe0af6b758dc582 (patch)
tree882d5c953a3770e4010d912de6588db6ca354d5e /drivers/spi/spidev.c
parentd21c95c569c462da20d491b75d0a45bd70ddc1bf (diff)
downloadlinux-linaro-stable-609f9e92b570f390a457a81effe0af6b758dc582.tar.gz
spidev: BKL pushdown
Add the BKL to spidev_open(), even though the existing locking looks adequate. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/spi/spidev.c')
-rw-r--r--drivers/spi/spidev.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index b3518ca9f04e..ab2b769c83ca 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -29,6 +29,7 @@
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/slab.h>
+#include <linux/smp_lock.h>
#include <linux/spi/spi.h>
#include <linux/spi/spidev.h>
@@ -393,6 +394,7 @@ static int spidev_open(struct inode *inode, struct file *filp)
struct spidev_data *spidev;
int status = -ENXIO;
+ lock_kernel();
mutex_lock(&device_list_lock);
list_for_each_entry(spidev, &device_list, device_entry) {
@@ -418,6 +420,7 @@ static int spidev_open(struct inode *inode, struct file *filp)
pr_debug("spidev: nothing for minor %d\n", iminor(inode));
mutex_unlock(&device_list_lock);
+ unlock_kernel();
return status;
}