4.16-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Falcon tlfalcon@linux.vnet.ibm.com
[ Upstream commit 41f714672f93608751dbd2fa2291d476a8ff0150 ]
The counter that tracks used TX descriptors pending completion needs to be zeroed as part of a device reset. This change fixes a bug causing transmit queues to be stopped unnecessarily and in some cases a transmit queue stall and timeout reset. If the counter is not reset, the remaining descriptors will not be "removed", effectively reducing queue capacity. If the queue is over half full, it will cause the queue to stall if stopped.
Signed-off-by: Thomas Falcon tlfalcon@linux.vnet.ibm.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/ibm/ibmvnic.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -2266,6 +2266,7 @@ static int reset_one_sub_crq_queue(struc }
memset(scrq->msgs, 0, 4 * PAGE_SIZE); + atomic_set(&scrq->used, 0); scrq->cur = 0;
rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,