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scsi: mpt3sas: Call cpu_relax() before calling udelay()

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Call cpu_relax() while waiting for the current blk-mq polling instance to
complete.

Link: https://lore.kernel.org/r/20210901152542.27866-1-sreekanth.reddy@broadcom.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sreekanth Reddy 2021-09-01 20:55:42 +05:30 committed by Martin K. Petersen
parent 4e28550829
commit e4953a9310
1 changed files with 3 additions and 1 deletions
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4
drivers/scsi/mpt3sas/mpt3sas_base.c
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@ -1582,8 +1582,10 @@ mpt3sas_base_pause_mq_polling(struct MPT3SAS_ADAPTER *ioc)
* wait for current poll to complete.
*/
for (qid = 0; qid < iopoll_q_count; qid++) {
while (atomic_read(&ioc->io_uring_poll_queues[qid].busy))
while (atomic_read(&ioc->io_uring_poll_queues[qid].busy)) {
cpu_relax();
udelay(500);
}
}
}