dmaengine: imx-sdma: Fix error checking in sdma_event_remap

[ 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>

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index cacc725..263f046 100644 (file)
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1869,7 +1869,7 @@ 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);
@@ -1917,7 +1917,7 @@ 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;