diff options
Diffstat (limited to 'drivers/s390/block/dasd.c')
| -rw-r--r-- | drivers/s390/block/dasd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 17b033d0e05..1a84fae155e 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -21,6 +21,7 @@ #include <linux/hdreg.h> #include <linux/async.h> #include <linux/mutex.h> +#include <linux/smp_lock.h> #include <asm/ccwdev.h> #include <asm/ebcdic.h> @@ -2235,6 +2236,7 @@ static int dasd_open(struct block_device *bdev, fmode_t mode) if (!block) return -ENODEV; + lock_kernel(); base = block->base; atomic_inc(&block->open_count); if (test_bit(DASD_FLAG_OFFLINE, &base->flags)) { @@ -2269,12 +2271,14 @@ static int dasd_open(struct block_device *bdev, fmode_t mode) goto out; } + unlock_kernel(); return 0; out: module_put(base->discipline->owner); unlock: atomic_dec(&block->open_count); + unlock_kernel(); return rc; } @@ -2282,8 +2286,10 @@ static int dasd_release(struct gendisk *disk, fmode_t mode) { struct dasd_block *block = disk->private_data; + lock_kernel(); atomic_dec(&block->open_count); module_put(block->base->discipline->owner); + unlock_kernel(); return 0; } |