diff options
Diffstat (limited to 'drivers/mtd/mtd_blkdevs.c')
| -rw-r--r-- | drivers/mtd/mtd_blkdevs.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 63790e975d2..f9329794f3b 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -29,7 +29,6 @@ #include <linux/blkdev.h> #include <linux/blkpg.h> #include <linux/spinlock.h> -#include <linux/smp_lock.h> #include <linux/hdreg.h> #include <linux/init.h> #include <linux/mutex.h> @@ -38,6 +37,7 @@ #include "mtdcore.h" +static DEFINE_MUTEX(mtd_blkdevs_mutex); static LIST_HEAD(blktrans_majors); static DEFINE_MUTEX(blktrans_ref_mutex); @@ -185,6 +185,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode) if (!dev) return -ERESTARTSYS; /* FIXME: busy loop! -arnd*/ + mutex_lock(&mtd_blkdevs_mutex); mutex_lock(&dev->lock); if (dev->open++) @@ -201,6 +202,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode) unlock: mutex_unlock(&dev->lock); blktrans_dev_put(dev); + mutex_unlock(&mtd_blkdevs_mutex); return ret; } @@ -212,6 +214,7 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode) if (!dev) return ret; + mutex_lock(&mtd_blkdevs_mutex); mutex_lock(&dev->lock); if (--dev->open) @@ -227,6 +230,7 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode) unlock: mutex_unlock(&dev->lock); blktrans_dev_put(dev); + mutex_unlock(&mtd_blkdevs_mutex); return ret; } @@ -259,6 +263,7 @@ static int blktrans_ioctl(struct block_device *bdev, fmode_t mode, if (!dev) return ret; + mutex_lock(&mtd_blkdevs_mutex); mutex_lock(&dev->lock); if (!dev->mtd) @@ -273,6 +278,7 @@ static int blktrans_ioctl(struct block_device *bdev, fmode_t mode, } unlock: mutex_unlock(&dev->lock); + mutex_unlock(&mtd_blkdevs_mutex); blktrans_dev_put(dev); return ret; } |