cookie_alloc() is called by iommu_get_dma_cookie() and iommu_get_msi_cookie(),
but the mutex is only initialized in iommu_get_dma_cookie(), move mutex_init()
into cookie_alloc() to make sure the mutex will be initialized.
Fixes: ac9a5d522bb8 ("iommu/dma: Fix race condition during iova_domain
initialization")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Yang Yingliang <yangyingli...@huawei.com>
---
drivers/iommu/dma-iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 1910f4f1612b..e29157380c48 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -294,6 +294,7 @@ static struct iommu_dma_cookie *cookie_alloc(enum
iommu_dma_cookie_type type)
if (cookie) {
INIT_LIST_HEAD(&cookie->msi_page_list);
cookie->type = type;
+ mutex_init(&cookie->mutex);
}
return cookie;
}
@@ -311,7 +312,6 @@ int iommu_get_dma_cookie(struct iommu_domain *domain)
if (!domain->iova_cookie)
return -ENOMEM;
- mutex_init(&domain->iova_cookie->mutex);
return 0;
}
--
2.25.1
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