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authorJulia Lawall <julia@diku.dk>2010-05-27 12:31:51 +0200
committerJoerg Roedel <joerg.roedel@amd.com>2010-05-27 12:40:11 +0200
commit84fe6c19e4a598e8071e3bd1b2c923454eae1268 (patch)
tree97acb87b00cc194665caf8cc5920cd7e7858bac1 /arch/x86
parentMerge branch 'iommu/largepages' into amd-iommu/2.6.35 (diff)
downloadlinux-84fe6c19e4a598e8071e3bd1b2c923454eae1268.tar.xz
linux-84fe6c19e4a598e8071e3bd1b2c923454eae1268.zip
arch/x86/kernel: Add missing spin_unlock
Add a spin_unlock missing on the error path. The locks and unlocks are balanced in other functions, so it seems that the same should be the case here. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression E1; @@ * spin_lock(E1,...); <+... when != E1 if (...) { ... when != E1 * return ...; } ...+> * spin_unlock(E1,...); // </smpl> Cc: stable@kernel.org Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/amd_iommu.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index fa5a1474cd18..8a9aaa8412c9 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1487,6 +1487,7 @@ static int __attach_device(struct device *dev,
struct protection_domain *domain)
{
struct iommu_dev_data *dev_data, *alias_data;
+ int ret;
dev_data = get_dev_data(dev);
alias_data = get_dev_data(dev_data->alias);
@@ -1498,13 +1499,14 @@ static int __attach_device(struct device *dev,
spin_lock(&domain->lock);
/* Some sanity checks */
+ ret = -EBUSY;
if (alias_data->domain != NULL &&
alias_data->domain != domain)
- return -EBUSY;
+ goto out_unlock;
if (dev_data->domain != NULL &&
dev_data->domain != domain)
- return -EBUSY;
+ goto out_unlock;
/* Do real assignment */
if (dev_data->alias != dev) {
@@ -1520,10 +1522,14 @@ static int __attach_device(struct device *dev,
atomic_inc(&dev_data->bind);
+ ret = 0;
+
+out_unlock:
+
/* ready */
spin_unlock(&domain->lock);
- return 0;
+ return ret;
}
/*