From: Sukadev Bhattiprolu sukadev@linux.ibm.com
[ 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 sukadev@linux.ibm.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- 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 4008007c2e34..d97641b9928b 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -4038,6 +4038,14 @@ 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");