ibmvnic: Update driver queues after change in ring size support

During device reset, queue memory is not being updated to accommodate
changes in ring buffer sizes supported by backing hardware. Track
any differences in ring buffer sizes following the reset and update
queue memory when possible.

Signed-off-by: Thomas Falcon <tlfalcon@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 066897a350a589a44243d9b66b933bca73546bf6..c0203a0d5e3b8be87f33a7eb7a1f11b1ecd8ca18 100644 (file)
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1737,6 +1737,7 @@ static int do_reset(struct ibmvnic_adapter *adapter,
                    struct ibmvnic_rwi *rwi, u32 reset_state)
 {
        u64 old_num_rx_queues, old_num_tx_queues;
+       u64 old_num_rx_slots, old_num_tx_slots;
        struct net_device *netdev = adapter->netdev;
        int i, rc;
 
@@ -1748,6 +1749,8 @@ static int do_reset(struct ibmvnic_adapter *adapter,
 
        old_num_rx_queues = adapter->req_rx_queues;
        old_num_tx_queues = adapter->req_tx_queues;
+       old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
+       old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
 
        ibmvnic_cleanup(netdev);
 
@@ -1810,7 +1813,11 @@ static int do_reset(struct ibmvnic_adapter *adapter,
                        if (rc)
                                return rc;
                } else if (adapter->req_rx_queues != old_num_rx_queues ||
-                          adapter->req_tx_queues != old_num_tx_queues) {
+                          adapter->req_tx_queues != old_num_tx_queues ||
+                          adapter->req_rx_add_entries_per_subcrq !=
+                                                       old_num_rx_slots ||
+                          adapter->req_tx_entries_per_subcrq !=
+                                                       old_num_tx_slots) {
                        release_rx_pools(adapter);
                        release_tx_pools(adapter);
                        release_napi(adapter);