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: 97548575 ("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>
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