From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
[ Upstream commit 073abfa7ea9a5b0537d6f92b42baedaf82a04c53 ]
If 'dmaengine_prep_slave_single()' fails, we must undo a previous
'dma_map_single()' call, as already done in all the other error handling
paths of this function.
Fixes: 0b1039f016e8 ("mtd: rawnand: Add NAND controller support on Intel LGM SoC")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20210124073955.728797-1-christophe.jaillet@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/mtd/nand/raw/intel-nand-controller.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/nand/raw/intel-nand-controller.c b/drivers/mtd/nand/raw/intel-nand-controller.c
index a304fda5d1fa5..8b49fd56cf964 100644
--- a/drivers/mtd/nand/raw/intel-nand-controller.c
+++ b/drivers/mtd/nand/raw/intel-nand-controller.c
@@ -318,8 +318,10 @@ static int ebu_dma_start(struct ebu_nand_controller *ebu_host, u32 dir,
}
tx = dmaengine_prep_slave_single(chan, buf_dma, len, dir, flags);
- if (!tx)
- return -ENXIO;
+ if (!tx) {
+ ret = -ENXIO;
+ goto err_unmap;
+ }
tx->callback = callback;
tx->callback_param = ebu_host;
--
2.27.0
