On 2020-11-03 18:43, Stephen Rothwell wrote:
Hi all,
Today's linux-next merge of the net-next tree got a conflict in:
drivers/net/ethernet/ibm/ibmvnic.c
between commit:
1d8504937478 ("powerpc/vnic: Extend "failover pending" window")
from the net tree and commit:
16b5f5ce351f ("ibmvnic: merge do_change_param_reset into do_reset")
from the net-next tree.
I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your
tree
is submitted for merging. You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any
particularly
complex conflicts.
Sorry I missed this email.
The fix is correct.
Thank you Stephen.
--
Cheers,
Stephen Rothwell
diff --cc drivers/net/ethernet/ibm/ibmvnic.c
index da15913879f8,f4167de30461..000000000000
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@@ -1930,17 -1841,12 +1850,20 @@@ static int do_reset(struct
ibmvnic_adap
netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
rwi->reset_reason);
- rtnl_lock();
+ adapter->reset_reason = rwi->reset_reason;
+ /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */
+ if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
+ rtnl_lock();
+
+ /*
+ * Now that we have the rtnl lock, clear any pending failover.
+ * This will ensure ibmvnic_open() has either completed or will
+ * block until failover is complete.
+ */
+ if (rwi->reset_reason == VNIC_RESET_FAILOVER)
+ adapter->failover_pending = false;
+
netif_carrier_off(netdev);
- adapter->reset_reason = rwi->reset_reason;
old_num_rx_queues = adapter->req_rx_queues;
old_num_tx_queues = adapter->req_tx_queues;
@@@ -2214,17 -2140,7 +2157,14 @@@ static void __ibmvnic_reset(struct
work
}
spin_unlock_irqrestore(&adapter->state_lock, flags);
- if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
- /* CHANGE_PARAM requestor holds rtnl_lock */
- rc = do_change_param_reset(adapter, rwi, reset_state);
- } else if (adapter->force_reset_recovery) {
+ if (adapter->force_reset_recovery) {
+ /*
+ * Since we are doing a hard reset now, clear the
+ * failover_pending flag so we don't ignore any
+ * future MOBILITY or other resets.
+ */
+ adapter->failover_pending = false;
+
/* Transport event occurred during previous reset */
if (adapter->wait_for_reset) {
/* Previous was CHANGE_PARAM; caller locked */
