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authorDavid Woodhouse <David.Woodhouse@intel.com>2010-10-30 12:35:11 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-10-30 12:35:11 +0100
commit67577927e8d7a1f4b09b4992df640eadc6aacb36 (patch)
tree2e9efe6b5745965faf0dcc084d4613d9356263f9 /drivers/mtd/mtd_blkdevs.c
parent6fe4c590313133ebd5dadb769031489ff178ece1 (diff)
parent51f00a471ce8f359627dd99aeac322947a0e491b (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Conflicts: drivers/mtd/mtd_blkdevs.c Merge Grant's device-tree bits so that we can apply the subsequent fixes. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/mtd_blkdevs.c')
-rw-r--r--drivers/mtd/mtd_blkdevs.c8
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;
}