FAILED: patch "[PATCH] mtd: rawnand: lpx32xx: Fix dma_request_chan() error checks" failed to apply to 5.4-stable tree

The patch below does not apply to the 5.4-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 <[email protected]>.

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-5.4.y
git checkout FETCH_HEAD
git cherry-pick -x a503f91a3645651a39baf97f1aed90d5d9f9bda9
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024073000-cedar-nutrient-4b9a@gregkh' --subject-prefix 'PATCH 5.4.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 <[email protected]>
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.

index 92cebe871bb4..b9c3adc54c01 100644
@@ -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");

index 3b7e3d259785..ade971e4cc3b 100644
@@ -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");