[PATCH 5.4 12/62] dmaengine: imx-sdma: Fix error checking in sdma_event_remap

Greg Kroah-Hartman
2022-04-26T08:42:49Z

From: Miaoqian Lin <linmq006@gmail.com>

[ Upstream commit 7104b9cb35a33ad803a1adbbfa50569b008faf15 ]

of_parse_phandle() returns NULL on errors, rather than error
pointers. Using NULL check on grp_np to fix this.

Fixes: d078cd1b4185 ("dmaengine: imx-sdma: Add imx6sx platform support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220308064952.15743-1-linmq006@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/dma/imx-sdma.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index cc70da05db4b..801bef83df2a 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1784,7 +1784,7 @@ static int sdma_event_remap(struct sdma_engine *sdma)
u32 reg, val, shift, num_map, i;
int ret = 0;

- if (IS_ERR(np) || IS_ERR(gpr_np))
+ if (IS_ERR(np) || !gpr_np)
goto out;

event_remap = of_find_property(np, propname, NULL);
@@ -1832,7 +1832,7 @@ static int sdma_event_remap(struct sdma_engine *sdma)
}

out:
- if (!IS_ERR(gpr_np))
+ if (gpr_np)
of_node_put(gpr_np);

return ret;
--
2.35.1