The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x a503f91a3645651a39baf97f1aed90d5d9f9bda9 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024073057-pasture-amused-2fe9@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

a503f91a3645 ("mtd: rawnand: lpx32xx: Fix dma_request_chan() error checks") 478211867460 ("mtd: rawnand: lpx32xx: Request DMA channels using DT entries")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a503f91a3645651a39baf97f1aed90d5d9f9bda9 Mon Sep 17 00:00:00 2001 From: Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com Date: Fri, 5 Jul 2024 13:51:35 +0200 Subject: [PATCH] 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@timesys.com Cc: stable@vger.kernel.org Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/20240705115139.126522-1-piotr.wojtaszczyk@...

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");