iommu/vt-d: Handle the failure case of dmar_reenable_qi()

dmar_reenable_qi() may not succeed. Check and return when it fails.

Signed-off-by: Yanfei Xu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>

Author: YanfeiXu

drivers/iommu/intel/iommu.c

@@ -2967,10 +2967,15 @@ static int init_iommu_hw(void)
 {
 	struct dmar_drhd_unit *drhd;
 	struct intel_iommu *iommu = NULL;
+	int ret;
 
-	for_each_active_iommu(iommu, drhd)
-		if (iommu->qi)
-			dmar_reenable_qi(iommu);
+	for_each_active_iommu(iommu, drhd) {
+		if (iommu->qi) {
+			ret = dmar_reenable_qi(iommu);
+			if (ret)
+				return ret;
+		}
+	}
 
 	for_each_iommu(iommu, drhd) {
 		if (drhd->ignored) {