mmc: bcm2835: Fix DMA channel leak on probe error
authorLukas Wunner <lukas@wunner.de>
Sat, 19 Jan 2019 15:31:00 +0000 (16:31 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 6 Feb 2019 16:31:35 +0000 (17:31 +0100)
commit6af069a10b9513b338582e310802225da145f7d8
treecfd7b6afa82cb251126d0b5c1414a6e87291e78f
parent5cb3a9220995cfb6234e664a5fa0f001e5ad2256
mmc: bcm2835: Fix DMA channel leak on probe error

commit 8c9620b1cc9b69e82fa8d4081d646d0016b602e7 upstream.

The BCM2835 MMC host driver requests a DMA channel on probe but neglects
to release the channel in the probe error path.  The channel may
therefore be leaked, in particular if devm_clk_get() causes probe
deferral.  Fix it.

Fixes: 660fc733bd74 ("mmc: bcm2835: Add new driver for the sdhost controller.")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: stable@vger.kernel.org # v4.12+
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mmc/host/bcm2835.c