From: Ohad Ben-Cohen <ohad@wizery.com>
Date: Fri, 2 Sep 2011 17:32:34 +0000 (-0400)
Subject: iommu/msm: ->unmap() should return order of unmapped page
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9e28547f887c3040747d8422e1feef79bea93bd8;p=linux-beck.git

iommu/msm: ->unmap() should return order of unmapped page

Users of the IOMMU API (kvm specifically) assume that iommu_unmap()
returns the order of the unmapped page (on success).

Fix msm_iommu_unmap() accordingly.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Stepan Moskovchenko <stepanm@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Acked-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index 1a584e077c61..d1733f672f16 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -543,6 +543,13 @@ static int msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
 	}
 
 	ret = __flush_iotlb(domain);
+
+	/*
+	 * the IOMMU API requires us to return the order of the unmapped
+	 * page (on success).
+	 */
+	if (!ret)
+		ret = order;
 fail:
 	spin_unlock_irqrestore(&msm_iommu_lock, flags);
 	return ret;