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Message-ID: <1327598984-20662-1-git-send-email-joerg.roedel@amd.com>
Date: Thu, 26 Jan 2012 18:29:44 +0100
From: Joerg Roedel <joerg.roedel@....com>
To: <iommu@...ts.linux-foundation.org>
CC: <linux-kernel@...r.kernel.org>,
Joerg Roedel <joerg.roedel@....com>,
David Brown <davidb@...eaurora.org>,
Stepan Moskovchenko <stepanm@...eaurora.org>
Subject: [PATCH] iommu/msm: Fix error handling in msm_iommu_unmap()
Error handling in msm_iommu_unmap() is broken. On some error
conditions retval is set to a non-zero value which causes
the function to return 'len' at the end. This hides the
error from the user. Zero should be returned in those error
cases.
Cc: David Brown <davidb@...eaurora.org>
Cc: Stepan Moskovchenko <stepanm@...eaurora.org>
Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
drivers/iommu/msm_iommu.c | 7 +------
1 files changed, 1 insertions(+), 6 deletions(-)
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index 08a90b8..cee307e 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -482,23 +482,19 @@ static size_t msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
priv = domain->priv;
- if (!priv) {
- ret = -ENODEV;
+ if (!priv)
goto fail;
- }
fl_table = priv->pgtable;
if (len != SZ_16M && len != SZ_1M &&
len != SZ_64K && len != SZ_4K) {
pr_debug("Bad length: %d\n", len);
- ret = -EINVAL;
goto fail;
}
if (!fl_table) {
pr_debug("Null page table\n");
- ret = -EINVAL;
goto fail;
}
@@ -507,7 +503,6 @@ static size_t msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
if (*fl_pte == 0) {
pr_debug("First level PTE is 0\n");
- ret = -ENODEV;
goto fail;
}
--
1.7.5.4
--
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