redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

s390/qdio: consider ERROR buffers for inbound-full condition

Browse source 
In the unlikely case that an ERROR buffer (presented by the HW)
consumed the last available slot on the input queue, increment the
corresponding statistics counter.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Julian Wiedmann 2017-10-23 09:40:16 +02:00 committed by Martin Schwidefsky
parent edfb8d8fcb
commit 0b926ac304
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/s390/cio/qdio_main.c
View file

@ -536,7 +536,8 @@ static int get_inbound_buffer_frontier(struct qdio_q *q)
case SLSB_P_INPUT_ERROR:
process_buffer_error(q, count);
q->first_to_check = add_buf(q->first_to_check, count);
atomic_sub(count, &q->nr_buf_used);
if (atomic_sub_return(count, &q->nr_buf_used) == 0)
qperf_inc(q, inbound_queue_full);
if (q->irq_ptr->perf_stat_enabled)
account_sbals_error(q, count);
break;