4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lukas Wunner <lukas@xxxxxxxxx>
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@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.12+
Cc: Frank Pavlic <f.pavlic@xxxxxxxxx>
Tested-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
