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authorJens Axboe <jaxboe@fusionio.com>2011-07-01 16:17:13 +0200
committerJens Axboe <jaxboe@fusionio.com>2011-07-01 16:17:13 +0200
commit04bf7869ca0fd12009aee301cac2264a36df4d98 (patch)
tree66cb81ebf8b76560a31433c2c493dc430c914af9 /fs/block_dev.c
parentd2f31a5fd60d168b00fc4f7617b68a1287b21e90 (diff)
parent7b28afe01ab6ffb5f152f47831b44933facd2328 (diff)
Merge branch 'for-linus' into for-3.1/core
Conflicts: block/blk-throttle.c block/cfq-iosched.c Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 1f2b1997833..610e8e0b04b 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -762,7 +762,19 @@ static struct block_device *bd_start_claiming(struct block_device *bdev,
if (!disk)
return ERR_PTR(-ENXIO);
- whole = bdget_disk(disk, 0);
+ /*
+ * Normally, @bdev should equal what's returned from bdget_disk()
+ * if partno is 0; however, some drivers (floppy) use multiple
+ * bdev's for the same physical device and @bdev may be one of the
+ * aliases. Keep @bdev if partno is 0. This means claimer
+ * tracking is broken for those devices but it has always been that
+ * way.
+ */
+ if (partno)
+ whole = bdget_disk(disk, 0);
+ else
+ whole = bdgrab(bdev);
+
module_put(disk->fops->owner);
put_disk(disk);
if (!whole)
@@ -1272,8 +1284,8 @@ int blkdev_get(struct block_device *bdev, fmode_t mode, void *holder)
* individual writeable reference is too fragile given the
* way @mode is used in blkdev_get/put().
*/
- if ((disk->flags & GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE) &&
- !res && (mode & FMODE_WRITE) && !bdev->bd_write_holder) {
+ if (!res && (mode & FMODE_WRITE) && !bdev->bd_write_holder &&
+ (disk->flags & GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE)) {
bdev->bd_write_holder = true;
disk_block_events(disk);
}