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liquidio: avoid doing useless work 

Avoid doing useless work by making sure that the response_list is not empty
before scheduling work to process it.

Signed-off-by: Prasad Kanneganti <prasad.kanneganti@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Prasad Kanneganti 2018-03-07 22:23:32 -08:00 committed by David S. Miller
parent fcbedd0f29
commit cecd8d81ac
2 changed files with 9 additions and 2 deletions
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5
drivers/net/ethernet/cavium/liquidio/request_manager.c
View File

@ -366,6 +366,7 @@ int
lio_process_iq_request_list(struct octeon_device *oct,
struct octeon_instr_queue *iq, u32 napi_budget)
{
struct cavium_wq *cwq = &oct->dma_comp_wq;
int reqtype;
void *buf;
u32 old = iq->flush_index;
@ -450,6 +451,10 @@ lio_process_iq_request_list(struct octeon_device *oct,
bytes_compl);
iq->flush_index = old;
if (atomic_read(&oct->response_list
[OCTEON_ORDERED_SC_LIST].pending_req_count))
queue_delayed_work(cwq->wq, &cwq->wk.work, msecs_to_jiffies(1));
return inst_count;
}

6
drivers/net/ethernet/cavium/liquidio/response_manager.c
View File

@ -49,7 +49,6 @@ int octeon_setup_response_list(struct octeon_device *oct)
INIT_DELAYED_WORK(&cwq->wk.work, oct_poll_req_completion);
cwq->wk.ctxptr = oct;
oct->cmd_resp_state = OCT_DRV_ONLINE;
queue_delayed_work(cwq->wq, &cwq->wk.work, msecs_to_jiffies(50));
return ret;
}
@ -164,5 +163,8 @@ static void oct_poll_req_completion(struct work_struct *work)
struct cavium_wq *cwq = &oct->dma_comp_wq;
lio_process_ordered_list(oct, 0);
queue_delayed_work(cwq->wq, &cwq->wk.work, msecs_to_jiffies(50));
if (atomic_read(&oct->response_list
[OCTEON_ORDERED_SC_LIST].pending_req_count))
queue_delayed_work(cwq->wq, &cwq->wk.work, msecs_to_jiffies(1));
}