Unverified Commit 5d8a355d authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!4113 PCI: check BIR before mapping MSI-X Table 

Merge Pull Request from: @ci-robot 
 
PR sync from: Xiongfeng Wang <wangxiongfeng2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/AH57HIT3LXCFSLYJRDSBFHJADTJ75J7L/ 
 
https://gitee.com/openeuler/kernel/issues/I8XWD4 
 
Link:https://gitee.com/openeuler/kernel/pulls/4113

 

Reviewed-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
parents e3cd8c9a 87b693cf

drivers/pci/msi/msi.c

+5 −0
Original line number Diff line number Diff line
@@ -579,6 +579,11 @@ static void __iomem *msix_map_region(struct pci_dev *dev, 
	pci_read_config_dword(dev, dev->msix_cap + PCI_MSIX_TABLE,

			      &table_offset);

	bir = (u8)(table_offset & PCI_MSIX_TABLE_BIR);

	if (bir >= DEVICE_COUNT_RESOURCE) {

		dev_err(&dev->dev, "MSI-X Table BIR is out of range !\n");

		return NULL;

	}



	flags = pci_resource_flags(dev, bir);

	if (!flags || (flags & IORESOURCE_UNSET))

		return NULL;