diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spidev.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index f5b60c70389..ddbe1a5e970 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -30,6 +30,7 @@ #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> @@ -464,6 +465,7 @@ 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) { @@ -489,6 +491,7 @@ 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; } |