From e2ffe4d5dc3f45a8bb9e96790583530dfae7b8af Mon Sep 17 00:00:00 2001 From: James Smart Date: Tue, 12 Mar 2019 16:30:15 -0700 Subject: [PATCH] scsi: lpfc: Convert bootstrap mbx polling from msleep to udelay Current code is using msleep when polling for hw ready. Unfortunately the msleep routine isn't very accurate on rescheduling. In fact, on a busy systems which reset the adapter, it became 10s of seconds before it was rescheduled. Fix by busy waiting using udelay. As we're now busy waiting, significantly reduce the wait time so that we can exit the pool loop as soon as possible. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen --- drivers/scsi/lpfc/lpfc_sli.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 4b084a4..5c162ab 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -8507,7 +8507,7 @@ lpfc_sli4_wait_bmbx_ready(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq) bmbx_reg.word0 = readl(phba->sli4_hba.BMBXregaddr); db_ready = bf_get(lpfc_bmbx_rdy, &bmbx_reg); if (!db_ready) - msleep(2); + mdelay(2); if (time_after(jiffies, timeout)) return MBXERR_ERROR; -- 2.7.4