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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2009-07-10 17:02:17 +0300 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-08-03 14:20:26 +0100 |
| commit | 8022c13c27b822cf22f13df10b42aae89cd56bf0 (patch) | |
| tree | bd6a16cdb98c6f1b8d150cd0d0a5567455a83581 /drivers | |
| parent | 6afc4fdb3e94ba60cd566cb878b60c6c01979277 (diff) | |
| download | linux-3.10-8022c13c27b822cf22f13df10b42aae89cd56bf0.tar.gz linux-3.10-8022c13c27b822cf22f13df10b42aae89cd56bf0.tar.bz2 linux-3.10-8022c13c27b822cf22f13df10b42aae89cd56bf0.zip | |
mtd: blkdevs: do not forget to get MTD devices
Nowadays MTD devices have to be "get" before they can be
used. This has to be done with 'get_mtd_device()'. The
'blktrans_open()' function did not do this and instead
used 'try_module_get()'. Fix this.
Since 'get_mtd_device()' already gets the module, extra
'try_module_get()' is not needed.
This fixes oops when one tries to use mtdblock on top of
gluebi.
Reported-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/mtd_blkdevs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index c3f62654b6d..7baba40c1ed 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -144,7 +144,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode) struct mtd_blktrans_ops *tr = dev->tr; int ret = -ENODEV; - if (!try_module_get(dev->mtd->owner)) + if (!get_mtd_device(NULL, dev->mtd->index)) goto out; if (!try_module_get(tr->owner)) @@ -158,7 +158,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode) ret = 0; if (tr->open && (ret = tr->open(dev))) { dev->mtd->usecount--; - module_put(dev->mtd->owner); + put_mtd_device(dev->mtd); out_tr: module_put(tr->owner); } @@ -177,7 +177,7 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode) if (!ret) { dev->mtd->usecount--; - module_put(dev->mtd->owner); + put_mtd_device(dev->mtd); module_put(tr->owner); } |