diff options
| author | Alexander Kappner <agk@godking.net> | 2018-03-28 15:18:31 -0700 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-04-04 09:56:23 +0200 |
| commit | d0a0852b9f81cf5f793bf2eae7336ed40a1a1815 (patch) | |
| tree | a41bd7a09cf53cdca99dd2cc835befc0599b79b6 /drivers/mmc | |
| parent | a04f0017c22453613d5f423326b190c61e3b4f98 (diff) | |
| download | linux-d0a0852b9f81cf5f793bf2eae7336ed40a1a1815.tar.gz | |
mmc: core: Prevent bus reference leak in mmc_blk_init()
Upon module load, mmc_block allocates a bus with bus_registeri() in
mmc_blk_init(). This reference never gets freed during module unload, which
leads to subsequent re-insertions of the module fails and a WARN() splat is
triggered.
Fix the bug by dropping the reference for the bus in mmc_blk_exit().
Signed-off-by: Alexander Kappner <agk@godking.net>
Fixes: 97548575bef3 ("mmc: block: Convert RPMB to a character device")
Cc: <stable@vger.kernel.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/block.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index a2b9c2500c4c..758657e4a85e 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -3080,6 +3080,7 @@ static void __exit mmc_blk_exit(void) mmc_unregister_driver(&mmc_driver); unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES); + bus_unregister(&mmc_rpmb_bus_type); } module_init(mmc_blk_init); |