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dmaengine: dw-edma-pcie: Reject devices without driver data

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[ Upstream commit 11d7cfe0c1 ]

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: 41aaff2a2a ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Koichiro Den
2026-08-03 11:15:37 +02:00
committed by Greg Kroah-Hartman
parent ac710b2f4f
commit 2733b5dcb5
1 changed files with 3 additions and 0 deletions
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drivers/dma/dw-edma/dw-edma-pcie.c
+3
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@@ -165,6 +165,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
int err, nr_irqs;
int i, mask;
if (!pdata)
return -ENODEV;
struct dw_edma_pcie_data *vsec_data __free(kfree) =
kmalloc(sizeof(*vsec_data), GFP_KERNEL);
if (!vsec_data)