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

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 <[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-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 11d7cfe0c119691b2dafbb699bbca90258c678aa
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --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 <[email protected]>
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.

index 2082d0021a8d..791c46e8ae4c 100644
@@ -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)