mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

ibmvnic: Zero used TX descriptor counter on reset 

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>
This commit is contained in:
Thomas Falcon 2018-04-06 18:37:03 -05:00 committed by David S. Miller
parent 37e40fa8f6
commit 41f714672f
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/ibm/ibmvnic.c
View File

@ -2361,6 +2361,7 @@ static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
}
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,