Re: [PATCH] libnvdimm: remove redundant assignment to pointer 'dev'
On Mon, Feb 05, 2018 at 02:08:52PM +0000, Colin King wrote:
From: Colin Ian King <colin.king(a)canonical.com>
Pointer dev is being assigned a value that is never read, it is being
re-assigned the same value later on, hence the initialization is redundant
and can be removed.
Cleans up clang warning:
drivers/nvdimm/pfn_devs.c:307:17: warning: Value stored to 'dev' during
its initialization is never read
Signed-off-by: Colin Ian King <colin.king(a)canonical.com>
Reviewed-by: Ross Zwisler <ross.zwisler(a)linux.intel.com>
More importantly this fixes a potential NULL pointer dereference. nd_pfn
is checked for NULL a few lines down, but we would have crashed here trying to
get nd_pfn->dev.
We can append the above info to the changelog when we apply.
---
drivers/nvdimm/pfn_devs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index f5c4e8c6e29d..2f4d18752c97 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -304,7 +304,7 @@ static const struct attribute_group *nd_pfn_attribute_groups[] = {
struct device *nd_pfn_devinit(struct nd_pfn *nd_pfn,
struct nd_namespace_common *ndns)
{
- struct device *dev = &nd_pfn->dev;
+ struct device *dev;
if (!nd_pfn)
return NULL;
--
2.15.1
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