From 31b6a05f86e690e1818116fd23c3be915cc9d9ed Mon Sep 17 00:00:00 2001 From: Steve Sistare Date: Fri, 1 Mar 2019 06:46:28 -0800 Subject: scsi: megaraid_sas: reduce module load time megaraid_sas takes 1+ seconds to load while waiting for firmware: [2.822603] megaraid_sas 0000:03:00.0: Waiting for FW to come to ready state [3.871003] megaraid_sas 0000:03:00.0: FW now in Ready state This is due to the following loop in megasas_transition_to_ready(), which waits a minimum of 1 second, even though the FW becomes ready in tens of millisecs: /* * The cur_state should not last for more than max_wait secs */ for (i = 0; i < max_wait; i++) { ... msleep(1000); ... dev_info(&instance->pdev->dev, "FW now in Ready state\n"); This is a regression, caused by a change of the msleep granularity from 1 to 1000 due to concern about waiting too long on systems with coarse jiffies. To fix, increase iterations and use msleep(20), which results in: [2.670627] megaraid_sas 0000:03:00.0: Waiting for FW to come to ready state [2.739386] megaraid_sas 0000:03:00.0: FW now in Ready state Fixes: fb2f3e96d80f ("scsi: megaraid_sas: Fix msleep granularity") Signed-off-by: Steve Sistare Acked-by: Sumit Saxena Signed-off-by: Martin K. Petersen --- drivers/scsi/megaraid/megaraid_sas_base.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/scsi/megaraid/megaraid_sas_base.c') diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 8a2ee4cf26b0..387fb930f799 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -3924,12 +3924,12 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr) /* * The cur_state should not last for more than max_wait secs */ - for (i = 0; i < max_wait; i++) { + for (i = 0; i < max_wait * 50; i++) { curr_abs_state = instance->instancet-> read_fw_status_reg(instance); if (abs_state == curr_abs_state) { - msleep(1000); + msleep(20); } else break; } -- cgit v1.2.3-59-g8ed1b