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authorMaxim Levitsky <maximlevitsky@gmail.com>2010-02-22 20:39:30 +0200
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-02-26 17:05:26 +0000
commit048d87199566663e4edc4880df3703c04bcf41d9 (patch)
treeda875d4f7802d6ca8a7db9f2cdba57b74d6c3672 /include/linux/mtd
parenta863862257b7dd08d855bafcb0aedd9ad848ed91 (diff)
mtd: blktrans: Hotplug fixes
* Add locking where it was missing. * Don't do a get_mtd_device in blktrans_open because it would lead to a deadlock; instead do that in add_mtd_blktrans_dev. * Only free the mtd_blktrans_dev structure when the last user exits. * Flush request queue on device removal. * Track users, and call tr->release in del_mtd_blktrans_dev Due to that ->open and release aren't called more that once. Now it is safe to call del_mtd_blktrans_dev while the device is still in use. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux/mtd')
-rw-r--r--include/linux/mtd/blktrans.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h
index a4b392868b54..d89b8fbba4c9 100644
--- a/include/linux/mtd/blktrans.h
+++ b/include/linux/mtd/blktrans.h
@@ -9,6 +9,7 @@
#define __MTD_TRANS_H__
#include <linux/mutex.h>
+#include <linux/kref.h>
struct hd_geometry;
struct mtd_info;
@@ -24,6 +25,8 @@ struct mtd_blktrans_dev {
int devnum;
unsigned long size;
int readonly;
+ int open;
+ struct kref ref;
struct gendisk *disk;
struct task_struct *thread;
struct request_queue *rq;