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| author | Joerg Roedel <joerg.roedel@amd.com> | 2012-01-26 18:25:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-13 11:17:01 -0800 |
| commit | d7cd8fc525c9322ceb1f1de26d7c6201aef9d842 (patch) | |
| tree | 68776c696d6382f07bdf5a4c6ee29e8ecc918054 | |
| parent | 61c39c6dcc3c7b3278c611a5bdcc135a1e4d825e (diff) | |
| download | lwn-d7cd8fc525c9322ceb1f1de26d7c6201aef9d842.tar.gz lwn-d7cd8fc525c9322ceb1f1de26d7c6201aef9d842.zip | |
iommu/msm: Fix error handling in msm_iommu_unmap()
commit 05df1f3c2afaef5672627f2b7095f0d4c4dbc3a0 upstream.
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@codeaurora.org>
Cc: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Acked-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | 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 5865dd2e28f9..a4d134d66820 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -481,23 +481,19 @@ static int 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; } @@ -506,7 +502,6 @@ static int 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; } |