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authorSreekanth Reddy <sreekanth.reddy@broadcom.com>2021-09-01 18:25:42 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2021-09-14 05:15:44 +0300
commite4953a93104c1fb1ef7989541f9867cc276467f9 (patch)
tree22bc70d877de042a6a09466bae067ad3a366cc28 /drivers/scsi/mpt3sas
parent4e28550829258f7dab97383acaa477bd724c0ff4 (diff)
downloadlinux-e4953a93104c1fb1ef7989541f9867cc276467f9.tar.xz
scsi: mpt3sas: Call cpu_relax() before calling udelay()
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>
Diffstat (limited to 'drivers/scsi/mpt3sas')
-rw-r--r--drivers/scsi/mpt3sas/mpt3sas_base.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 6c82435bc9cc..27eb652b564f 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -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);
+ }
}
}