[PATCH net] ibmvnic: Fix error recovery on login failure

[PATCH net] ibmvnic: Fix error recovery on login failure

[John Allen]

Testing has uncovered a failure case that is not handled properly. In the
event that a login fails and we are not able to recover on the spot, we
return 0 from do_reset, preventing any error recovery code from being
triggered.  Additionally, the state is set to "probed" meaning that when we
are able to trigger the error recovery, the driver always comes up in the
probed state. To handle the case properly, we need to return a failure code
here and set the adapter state to the state that we entered the reset in
indicating the state that we would like to come out of the recovery reset
in.

Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
---
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index d0e196b..c1e23bb 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1825,8 +1825,8 @@ static int do_reset(struct ibmvnic_adapter *adapter,
 
 		rc = ibmvnic_login(netdev);
 		if (rc) {
-			adapter->state = VNIC_PROBED;
-			return 0;
+			adapter->state = reset_state;
+			return rc;
 		}
 
 		if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||

Re: [PATCH net] ibmvnic: Fix error recovery on login failure

[David Miller]

From: John Allen <jallen@linux.ibm.com>
Date: Mon, 16 Jul 2018 10:29:30 -0500

> Testing has uncovered a failure case that is not handled properly. In the
> event that a login fails and we are not able to recover on the spot, we
> return 0 from do_reset, preventing any error recovery code from being
> triggered.  Additionally, the state is set to "probed" meaning that when we
> are able to trigger the error recovery, the driver always comes up in the
> probed state. To handle the case properly, we need to return a failure code
> here and set the adapter state to the state that we entered the reset in
> indicating the state that we would like to come out of the recovery reset
> in.
> 
> Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>

Applied, thanks.