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authorLu Baolu <baolu.lu@linux.intel.com>2021-11-08 14:13:49 +0800
committerJoerg Roedel <jroedel@suse.de>2021-12-06 12:39:05 +0100
commit556f99ac886635e8da15528995f06d1d7028cfca (patch)
tree9c47d16894d5d3136c1323d65762f1c537d95212 /drivers/iommu
parent94aedac49d92b22995d7b9092c6551b8b9924320 (diff)
downloadlinux-556f99ac886635e8da15528995f06d1d7028cfca.tar.bz2
iommu: Extend mutex lock scope in iommu_probe_device()
Extend the scope of holding group->mutex so that it can cover the default domain check/attachment and direct mappings of reserved regions. Cc: Ashish Mhetre <amhetre@nvidia.com> Fixes: 211ff31b3d33b ("iommu: Fix race condition during default domain allocation") Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20211108061349.1985579-1-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/iommu.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index dd7863e453a5..8b86406b7162 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -288,11 +288,11 @@ int iommu_probe_device(struct device *dev)
*/
mutex_lock(&group->mutex);
iommu_alloc_default_domain(group, dev);
- mutex_unlock(&group->mutex);
if (group->default_domain) {
ret = __iommu_attach_device(group->default_domain, dev);
if (ret) {
+ mutex_unlock(&group->mutex);
iommu_group_put(group);
goto err_release;
}
@@ -300,6 +300,7 @@ int iommu_probe_device(struct device *dev)
iommu_create_device_direct_mappings(group, dev);
+ mutex_unlock(&group->mutex);
iommu_group_put(group);
if (ops->probe_finalize)