# \[PATCH AUTOSEL 5.14 01/34\] ibmvnic: check failover\_pending in login response - From: Sasha Levin \ - Date: 2021-09-23 03:38:48 - List: netdev - Page: https://ratatoskr.run/netdev/2021/09/1519010 - Thread: https://ratatoskr.run/stable/2021/09/1519010/t.md ```text From: Sukadev Bhattiprolu [ Upstream commit d437f5aa23aa2b7bd07cd44b839d7546cc17166f ] If a failover occurs before a login response is received, the login response buffer maybe undefined. Check that there was no failover before accessing the login response buffer. Signed-off-by: Sukadev Bhattiprolu Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/ibm/ibmvnic.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index a775c69e4fd7..6aa6ff89a765 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -4700,6 +4700,14 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, return 0; } + if (adapter->failover_pending) { + adapter->init_done_rc = -EAGAIN; + netdev_dbg(netdev, "Failover pending, ignoring login response\n"); + complete(&adapter->init_done); + /* login response buffer will be released on reset */ + return 0; + } + netdev->mtu = adapter->req_mtu - ETH_HLEN; netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); -- 2.30.2 ```