| Message ID | 20210901152542.27866-1-sreekanth.reddy@broadcom.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | mpt3sas: Call cpu_relax() before calling udelay() | expand |
On 9/1/21 8:25 AM, Sreekanth Reddy wrote: > Call cpu_relax() API while waiting for the current blk-mq polling > instance to complete. Thanks! Reviewed-by: Bart Van Assche <bvanassche@acm.org>
On Wed, 1 Sep 2021 20:55:42 +0530, Sreekanth Reddy wrote: > Call cpu_relax() API while waiting for the current blk-mq polling > instance to complete. > > Applied to 5.15/scsi-fixes, thanks! [1/1] mpt3sas: Call cpu_relax() before calling udelay() https://git.kernel.org/mkp/scsi/c/e4953a93104c
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 2528c4e7b0e0..c0d0d311d676 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); + } } }
Call cpu_relax() API while waiting for the current blk-mq polling instance to complete. Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> --- drivers/scsi/mpt3sas/mpt3sas_base.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)