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

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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>
This commit is contained in:
Koichiro Den 2026-05-21 23:21:51 +09:00 committed by Vinod Koul
parent c0a207898f
commit 11d7cfe0c1
1 changed files with 3 additions and 0 deletions
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3
drivers/dma/dw-edma/dw-edma-pcie.c
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@ -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)