The dma_request_chan() returns error pointer in case of error, while
dma_request_channel() returns NULL in case of error therefore different
error checks are needed for the two.
Fixes: 7326d3fb1ee3 ("mtd: rawnand: lpx32xx: Request DMA channels using DT entries")
Signed-off-by: Piotr Wojtaszczyk <piotr.wojtaszczyk@xxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20240705115139.126522-1-piotr.wojtaszczyk@xxxxxxxxxxx
diff --git a/drivers/mtd/nand/raw/lpc32xx_mlc.c b/drivers/mtd/nand/raw/lpc32xx_mlc.c
index 92cebe871bb4..b9c3adc54c01 100644
--- a/drivers/mtd/nand/raw/lpc32xx_mlc.c
+++ b/drivers/mtd/nand/raw/lpc32xx_mlc.c
@@ -575,7 +575,7 @@ static int lpc32xx_dma_setup(struct lpc32xx_nand_host *host)
dma_cap_mask_t mask;
host->dma_chan = dma_request_chan(mtd->dev.parent, "rx-tx");
- if (!host->dma_chan) {
+ if (IS_ERR(host->dma_chan)) {
/* fallback to request using platform data */
if (!host->pdata || !host->pdata->dma_filter) {
dev_err(mtd->dev.parent, "no DMA platform data\n");
diff --git a/drivers/mtd/nand/raw/lpc32xx_slc.c b/drivers/mtd/nand/raw/lpc32xx_slc.c
index 3b7e3d259785..ade971e4cc3b 100644
--- a/drivers/mtd/nand/raw/lpc32xx_slc.c
+++ b/drivers/mtd/nand/raw/lpc32xx_slc.c
@@ -722,7 +722,7 @@ static int lpc32xx_nand_dma_setup(struct lpc32xx_nand_host *host)
dma_cap_mask_t mask;
host->dma_chan = dma_request_chan(mtd->dev.parent, "rx-tx");
- if (!host->dma_chan) {
+ if (IS_ERR(host->dma_chan)) {
/* fallback to request using platform data */
if (!host->pdata || !host->pdata->dma_filter) {
dev_err(mtd->dev.parent, "no DMA platform data\n");
