If platform_get_resource_byname() fails and returns NULL, dereferencing
res->start will cause a NULL pointer access. Add a check to prevent it.
Fixes: 1bf5f25324f7 ("PCI: endpoint: Add PCI Endpoint function driver for MHI bus")
Signed-off-by: Zhongqiu Han <quic_zhonhan@xxxxxxxxxxx>
---
drivers/pci/endpoint/functions/pci-epf-mhi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c
index 7d070b1def11..2712026733ab 100644
--- a/drivers/pci/endpoint/functions/pci-epf-mhi.c
+++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c
@@ -873,6 +873,11 @@ static int pci_epf_mhi_bind(struct pci_epf *epf)
/* Get MMIO base address from Endpoint controller */
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mmio");
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get MMIO base address\n");
+ return -ENODEV;
+ }
+
epf_mhi->mmio_phys = res->start;
epf_mhi->mmio_size = resource_size(res);
--
2.25.1
