From: Liang He windhl@126.com
[ Upstream commit 90de546d9a0b3c771667af18bb3f80567eabb89b ]
In vnet_port_probe() and vsw_port_probe(), we should check the return value of mdesc_grab() as it may return NULL which can caused NPD bugs.
Fixes: 5d01fa0c6bd8 ("ldmvsw: Add ldmvsw.c driver code") Fixes: 43fdf27470b2 ("[SPARC64]: Abstract out mdesc accesses for better MD update handling.") Signed-off-by: Liang He windhl@126.com Reviewed-by: Piotr Raczynski piotr.raczynski@intel.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/sun/ldmvsw.c | 3 +++ drivers/net/ethernet/sun/sunvnet.c | 3 +++ 2 files changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c index 644e42c181ee6..1c9522ad31787 100644 --- a/drivers/net/ethernet/sun/ldmvsw.c +++ b/drivers/net/ethernet/sun/ldmvsw.c @@ -291,6 +291,9 @@ static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
hp = mdesc_grab();
+ if (!hp) + return -ENODEV; + rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len); err = -ENODEV; if (!rmac) { diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c index 590172818b922..3a1f0653cfb76 100644 --- a/drivers/net/ethernet/sun/sunvnet.c +++ b/drivers/net/ethernet/sun/sunvnet.c @@ -432,6 +432,9 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
hp = mdesc_grab();
+ if (!hp) + return -ENODEV; + vp = vnet_find_parent(hp, vdev->mp, vdev); if (IS_ERR(vp)) { pr_err("Cannot find port parent vnet\n");