FAILED: patch "[PATCH] dmaengine: fsl-edma: correct max_segment_size setting" failed to apply to 6.1-stable tree

FAILED: patch "[PATCH] dmaengine: fsl-edma: correct max_segment_size setting" failed to apply to 6.1-stable tree

[gregkh]

The patch below does not apply to the 6.1-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-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x a79f949a5ce1d45329d63742c2a995f2b47f9852
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2024030434-underling-helmet-8fbe@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

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

From a79f949a5ce1d45329d63742c2a995f2b47f9852 Mon Sep 17 00:00:00 2001
From: Frank Li <Frank.Li@nxp.com>
Date: Wed, 7 Feb 2024 14:47:32 -0500
Subject: [PATCH] dmaengine: fsl-edma: correct max_segment_size setting

Correcting the previous setting of 0x3fff to the actual value of 0x7fff.

Introduced new macro 'EDMA_TCD_ITER_MASK' for improved code clarity and
utilization of FIELD_GET to obtain the accurate maximum value.

Cc: stable@vger.kernel.org
Fixes: e06748539432 ("dmaengine: fsl-edma: support edma memcpy")
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240207194733.2112870-1-Frank.Li@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h
index bb5221158a77..f5e216b157c7 100644
--- a/drivers/dma/fsl-edma-common.h
+++ b/drivers/dma/fsl-edma-common.h
@@ -30,8 +30,9 @@
 #define EDMA_TCD_ATTR_SSIZE(x)		(((x) & GENMASK(2, 0)) << 8)
 #define EDMA_TCD_ATTR_SMOD(x)		(((x) & GENMASK(4, 0)) << 11)
 
-#define EDMA_TCD_CITER_CITER(x)		((x) & GENMASK(14, 0))
-#define EDMA_TCD_BITER_BITER(x)		((x) & GENMASK(14, 0))
+#define EDMA_TCD_ITER_MASK		GENMASK(14, 0)
+#define EDMA_TCD_CITER_CITER(x)		((x) & EDMA_TCD_ITER_MASK)
+#define EDMA_TCD_BITER_BITER(x)		((x) & EDMA_TCD_ITER_MASK)
 
 #define EDMA_TCD_CSR_START		BIT(0)
 #define EDMA_TCD_CSR_INT_MAJOR		BIT(1)
diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c
index 45cc419b1b4a..d36e28b9c767 100644
--- a/drivers/dma/fsl-edma-main.c
+++ b/drivers/dma/fsl-edma-main.c
@@ -10,6 +10,7 @@
  */
 
 #include <dt-bindings/dma/fsl-edma.h>
+#include <linux/bitfield.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/clk.h>
@@ -582,7 +583,8 @@ static int fsl_edma_probe(struct platform_device *pdev)
 					DMAENGINE_ALIGN_32_BYTES;
 
 	/* Per worst case 'nbytes = 1' take CITER as the max_seg_size */
-	dma_set_max_seg_size(fsl_edma->dma_dev.dev, 0x3fff);
+	dma_set_max_seg_size(fsl_edma->dma_dev.dev,
+			     FIELD_GET(EDMA_TCD_ITER_MASK, EDMA_TCD_ITER_MASK));
 
 	fsl_edma->dma_dev.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;