4.14-stable review patch. If anyone has any objections, please let me know.
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From: Lukas Wunner lukas@wunner.de
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 | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/mmc/host/bcm2835.c +++ b/drivers/mmc/host/bcm2835.c @@ -1427,6 +1427,8 @@ static int bcm2835_probe(struct platform
err: dev_dbg(dev, "%s -> err %d\n", __func__, ret); + if (host->dma_chan_rxtx) + dma_release_channel(host->dma_chan_rxtx); mmc_free_host(mmc);
return ret;