FAILED: patch "[PATCH] dmaengine: dw-edma-pcie: Reject devices without driver data" failed to apply to 5.15-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.15-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-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 11d7cfe0c119691b2dafbb699bbca90258c678aa
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026072012-massive-dragster-edb4@gregkh' --subject-prefix 'PATCH 5.15.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

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

From 11d7cfe0c119691b2dafbb699bbca90258c678aa Mon Sep 17 00:00:00 2001
From: Koichiro Den <den@valinux.co.jp>
Date: Thu, 21 May 2026 23:21:51 +0900
Subject: [PATCH] dmaengine: dw-edma-pcie: Reject devices without driver data

dw_edma_pcie_probe() treats the PCI device ID driver_data as the
template for the controller layout and copies it unconditionally. A
device bound dynamically via sysfs can match the driver without that
data, which leads to a NULL pointer dereference.

Reject such matches before enabling the device.

Fixes: 41aaff2a2ac0 ("dmaengine: Add Synopsys eDMA IP PCIe glue-logic")
Cc: stable@vger.kernel.org
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260521142153.2957432-3-den@valinux.co.jp
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 2082d0021a8d..791c46e8ae4c 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -328,6 +328,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	int i, mask;
 	bool non_ll = false;
 
+	if (!pdata)
+		return -ENODEV;
+
 	struct dw_edma_pcie_data *vsec_data __free(kfree) =
 		kmalloc_obj(*vsec_data);
 	if (!vsec_data)