4.19-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 5bf032ef08e6a110edc1e3bfb3c66a208fb55125 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/ibm/ibmvnic.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index f1d4d7a1278b..5ab21a1b5444 100644 --- 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);