iommu/amd: Fix error code path in early_amd_iommu_init()

rafaeljw · joergroedel · commit 99e8ccd3837a · 2017-01-10T14:57:34.000+01:00
Prevent early_amd_iommu_init() from leaking memory mapped via
acpi_get_table() if check_ivrs_checksum() returns an error.

Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
Signed-off-by: Joerg Roedel &lt;jroedel@suse.de&gt;
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
@@ -2230,7 +2230,7 @@ static int __init early_amd_iommu_init(void)
 	 */
 	ret = check_ivrs_checksum(ivrs_base);
 	if (ret)
-		return ret;
+		goto out;
 
 	amd_iommu_target_ivhd_type = get_highest_supported_ivhd_type(ivrs_base);
 	DUMP_printk("Using IVHD type %#x\n", amd_iommu_target_ivhd_type);
