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Message-Id: <20240705115139.126522-1-piotr.wojtaszczyk@timesys.com>
Date: Fri, 5 Jul 2024 13:51:35 +0200
From: Piotr Wojtaszczyk <piotr.wojtaszczyk@...esys.com>
To: miquel.raynal@...tlin.com
Cc: Piotr Wojtaszczyk <piotr.wojtaszczyk@...esys.com>,
stable@...r.kernel.org,
Richard Weinberger <richard@....at>,
Vignesh Raghavendra <vigneshr@...com>,
Vladimir Zapolskiy <vz@...ia.com>,
Arnd Bergmann <arnd@...db.de>,
Yangtao Li <frank.li@...o.com>,
Li Zetao <lizetao1@...wei.com>,
linux-mtd@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: [Patch v2] mtd: rawnand: lpx32xx: Fix dma_request_chan() error checks
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@...esys.com>
Cc: stable@...r.kernel.org
---
Changes v2:
- Corrected 'Fixes' tag
- add Cc: stable
drivers/mtd/nand/raw/lpc32xx_mlc.c | 2 +-
drivers/mtd/nand/raw/lpc32xx_slc.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
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");
--
2.25.1
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