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net/smc: move testlink work to system work queue 

The testlink work waits for a response to the testlink request and
blocks the single threaded llc_wq. This type of work does not have to be
serialized and can be moved to the system work queue.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Graul 2020-04-29 17:10:44 +02:00 committed by David S. Miller
parent d854fcbfae
commit 1020e1ef53
1 changed files with 6 additions and 5 deletions
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11
net/smc/smc_llc.c
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@ -613,14 +613,15 @@ static void smc_llc_testlink_work(struct work_struct *work)
/* receive TEST LINK response over RoCE fabric */ /* receive TEST LINK response over RoCE fabric */
rc = wait_for_completion_interruptible_timeout(&link->llc_testlink_resp, rc = wait_for_completion_interruptible_timeout(&link->llc_testlink_resp,
SMC_LLC_WAIT_TIME); SMC_LLC_WAIT_TIME);
if (link->state != SMC_LNK_ACTIVE)
return; /* link state changed */
if (rc <= 0) { if (rc <= 0) {
smc_lgr_terminate_sched(smc_get_lgr(link)); smc_lgr_terminate_sched(smc_get_lgr(link));
return; return;
} }
next_interval = link->llc_testlink_time; next_interval = link->llc_testlink_time;
out: out:
queue_delayed_work(link->llc_wq, &link->llc_testlink_wrk, schedule_delayed_work(&link->llc_testlink_wrk, next_interval);
next_interval);
} }
int smc_llc_link_init(struct smc_link *link) int smc_llc_link_init(struct smc_link *link)
@ -648,8 +649,8 @@ void smc_llc_link_active(struct smc_link *link, int testlink_time)
link->state = SMC_LNK_ACTIVE; link->state = SMC_LNK_ACTIVE;
if (testlink_time) { if (testlink_time) {
link->llc_testlink_time = testlink_time * HZ; link->llc_testlink_time = testlink_time * HZ;
queue_delayed_work(link->llc_wq, &link->llc_testlink_wrk, schedule_delayed_work(&link->llc_testlink_wrk,
link->llc_testlink_time); link->llc_testlink_time);
} }
} }
@ -665,7 +666,7 @@ void smc_llc_link_inactive(struct smc_link *link)
if (link->state == SMC_LNK_INACTIVE) if (link->state == SMC_LNK_INACTIVE)
return; return;
link->state = SMC_LNK_INACTIVE; link->state = SMC_LNK_INACTIVE;
cancel_delayed_work(&link->llc_testlink_wrk); cancel_delayed_work_sync(&link->llc_testlink_wrk);
smc_wr_wakeup_reg_wait(link); smc_wr_wakeup_reg_wait(link);
smc_wr_wakeup_tx_wait(link); smc_wr_wakeup_tx_wait(link);
} }