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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-12-17 17:37:26 +0200
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-12-26 19:15:17 +0200
commite73f4459d969bb266f03dd4cbe21bdba8cb2732c (patch)
tree5af7655da65f2c33f6ea4efdfaa8b0e0670d6aea /drivers/mtd/ubi/wl.c
parent9f961b57568960a150cc9781c52824c9093a0514 (diff)
downloadop-kernel-dev-e73f4459d969bb266f03dd4cbe21bdba8cb2732c.zip
op-kernel-dev-e73f4459d969bb266f03dd4cbe21bdba8cb2732c.tar.gz
UBI: add UBI devices reference counting
This is one more step on the way to "removable" UBI devices. It adds reference counting for UBI devices. Every time a volume on this device is opened - the device's refcount is increased. It is also increased if someone is reading any sysfs file of this UBI device or of one of its volumes. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd/ubi/wl.c')
-rw-r--r--drivers/mtd/ubi/wl.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 7d32f71..bfc64c8 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1303,6 +1303,7 @@ int ubi_wl_flush(struct ubi_device *ubi)
* Make sure all the works which have been done in parallel are
* finished.
*/
+ ubi_assert(ubi->ref_count > 0);
down_write(&ubi->work_sem);
up_write(&ubi->work_sem);
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