From: Joerg Roedel <jroedel@suse.de>
Date: Fri, 16 Jun 2017 14:09:56 +0000 (+0200)
Subject: iommu/amd: Add new init-state IOMMU_CMDLINE_DISABLED
X-Git-Tag: v4.13-rc1~52^2^7~5
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1b1e942e344d3d41de187c1275024e915cb15844;p=karo-tx-linux.git

iommu/amd: Add new init-state IOMMU_CMDLINE_DISABLED

This will be used when during initialization we detect that
the iommu should be disabled.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 74f4eea6be77..df9ec85271f5 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -237,6 +237,7 @@ enum iommu_init_state {
 	IOMMU_INITIALIZED,
 	IOMMU_NOT_FOUND,
 	IOMMU_INIT_ERROR,
+	IOMMU_CMDLINE_DISABLED,
 };
 
 /* Early ioapic and hpet maps from kernel command line */
@@ -2452,6 +2453,7 @@ static int __init state_next(void)
 		break;
 	case IOMMU_NOT_FOUND:
 	case IOMMU_INIT_ERROR:
+	case IOMMU_CMDLINE_DISABLED:
 		/* Error states => do nothing */
 		ret = -EINVAL;
 		break;
@@ -2469,8 +2471,9 @@ static int __init iommu_go_to_state(enum iommu_init_state state)
 
 	while (init_state != state) {
 		ret = state_next();
-		if (init_state == IOMMU_NOT_FOUND ||
-		    init_state == IOMMU_INIT_ERROR)
+		if (init_state == IOMMU_NOT_FOUND         ||
+		    init_state == IOMMU_INIT_ERROR        ||
+		    init_state == IOMMU_CMDLINE_DISABLED)
 			break;
 	}