[PATCH 01/10] iommu/amd: take into account that alloc_dev_data() may return NULL

2018-03-22 Thread Sebastian Andrzej Siewior 
find_dev_data() does not check whether the return value alloc_dev_data()
is NULL. This was okay once because the pointer was returned once as-is.
Since commit df3f7a6e8e85 ("iommu/amd: Use is_attach_deferred
call-back") the pointer may be used within find_dev_data() so a NULL
check is required.

Cc: Baoquan He 
Fixes: df3f7a6e8e85 ("iommu/amd: Use is_attach_deferred call-back")
Signed-off-by: Sebastian Andrzej Siewior 
---
 drivers/iommu/amd_iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 4cd19f93ca15..121c54f1c768 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -310,6 +310,8 @@ static struct iommu_dev_data *find_dev_data(u16 devid)
 
if (dev_data == NULL) {
dev_data = alloc_dev_data(devid);
+   if (!dev_data)
+   return NULL;
 
if (translation_pre_enabled(iommu))
dev_data->defer_attach = true;
-- 
2.16.2

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[PATCH 01/10] iommu/amd: take into account that alloc_dev_data() may return NULL

2018-03-16 Thread Sebastian Andrzej Siewior 
find_dev_data() does not check whether the return value alloc_dev_data()
is NULL. This was okay once because the pointer was returned once as-is.
Since commit df3f7a6e8e85 ("iommu/amd: Use is_attach_deferred
call-back") the pointer may be used within find_dev_data() so a NULL
check is required.

Cc: Baoquan He 
Fixes: df3f7a6e8e85 ("iommu/amd: Use is_attach_deferred call-back")
Signed-off-by: Sebastian Andrzej Siewior 
---
 drivers/iommu/amd_iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 05f55903dbf6..b50dcb17c68f 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -310,6 +310,8 @@ static struct iommu_dev_data *find_dev_data(u16 devid)
 
if (dev_data == NULL) {
dev_data = alloc_dev_data(devid);
+   if (!dev_data)
+   return NULL;
 
if (translation_pre_enabled(iommu))
dev_data->defer_attach = true;
-- 
2.16.2

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[PATCH 01/10] iommu/amd: take into account that alloc_dev_data() may return NULL

2018-02-23 Thread Sebastian Andrzej Siewior 
find_dev_data() does not check whether the return value alloc_dev_data()
is NULL. This was okay once because the pointer was returned once as-is.
Since commit df3f7a6e8e85 ("iommu/amd: Use is_attach_deferred
call-back") the pointer may be used within find_dev_data() so a NULL
check is required.

Cc: Baoquan He 
Fixes: df3f7a6e8e85 ("iommu/amd: Use is_attach_deferred call-back")
Signed-off-by: Sebastian Andrzej Siewior 
---
 drivers/iommu/amd_iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 74788fdeb773..8b591c192daf 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -310,6 +310,8 @@ static struct iommu_dev_data *find_dev_data(u16 devid)
 
if (dev_data == NULL) {
dev_data = alloc_dev_data(devid);
+   if (!dev_data)
+   return NULL;
 
if (translation_pre_enabled(iommu))
dev_data->defer_attach = true;
-- 
2.16.1

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