platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference
a bit later in the code.
This is detected by Coccinelle semantic patch.
@@
expression pdev, res, n, t, e, e1, e2;
@@
res = platform_get_resource(pdev, t, n);
+ if (!res)
+ return -EINVAL;
... when != res == NULL
e = devm_ioremap_nocache(e1, res->start, e2);
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
drivers/usb/roles/intel-xhci-usb-role-switch.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c
b/drivers/usb/roles/intel-xhci-usb-role-switch.c
index de72eed..2810212 100644
--- a/drivers/usb/roles/intel-xhci-usb-role-switch.c
+++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c
@@ -144,6 +144,8 @@ static int intel_xhci_usb_probe(struct platform_device
*pdev)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
data->base = devm_ioremap_nocache(dev, res->start, resource_size(res));
if (!data->base)
return -ENOMEM;
--
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