tree e110d0390c392acd3292edefc4be7c2bd863b108
parent e2fce5a5578d175cd61822473228ab454782bec7
author Christoph Hellwig <hch@lst.de> 1508325601 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1513760851 +0100

nvme: use kref_get_unless_zero in nvme_find_get_ns


[ Upstream commit 2dd4122854f697afc777582d18548dded03ce5dd ]

For kref_get_unless_zero to protect against lookup vs free races we need
to use it in all places where we aren't guaranteed to already hold a
reference.  There is no such guarantee in nvme_find_get_ns, so switch to
kref_get_unless_zero in this function.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>