Add the missing unlock before return from function arm_smmu_device_group() in the error handling case.
Fixes: b1a1347912a7 ("iommu/arm-smmu: Fix race condition during iommu_group creation") Reported-by: Hulk Robot <hul...@huawei.com> Signed-off-by: Yang Yingliang <yangyingli...@huawei.com> --- drivers/iommu/arm/arm-smmu/arm-smmu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index 73893180ec7e..4bc75c4ce402 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -1478,8 +1478,10 @@ static struct iommu_group *arm_smmu_device_group(struct device *dev) mutex_lock(&smmu->stream_map_mutex); for_each_cfg_sme(cfg, fwspec, i, idx) { if (group && smmu->s2crs[idx].group && - group != smmu->s2crs[idx].group) + group != smmu->s2crs[idx].group) { + mutex_unlock(&smmu->stream_map_mutex); return ERR_PTR(-EINVAL); + } group = smmu->s2crs[idx].group; } -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu