linux-kernel - [PATCH AUTOSEL 4.19 1/3] scsi: mpt3sas: Prevent sending diag

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Date: Mon, 11 Mar 2024 11:14:51 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Ranjan Kumar <ranjan.kumar@...adcom.com>,
	"Martin K . Petersen" <martin.petersen@...cle.com>,
	Sasha Levin <sashal@...nel.org>,
	sathya.prakash@...adcom.com,
	sreekanth.reddy@...adcom.com,
	suganath-prabu.subramani@...adcom.com,
	jejb@...ux.ibm.com,
	MPT-FusionLinux.pdl@...adcom.com,
	linux-scsi@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 1/3] scsi: mpt3sas: Prevent sending diag_reset when the controller is ready

From: Ranjan Kumar <ranjan.kumar@...adcom.com>

[ Upstream commit ee0017c3ed8a8abfa4d40e42f908fb38c31e7515 ]

If the driver detects that the controller is not ready before sending the
first IOC facts command, it will wait for a maximum of 10 seconds for it to
become ready. However, even if the controller becomes ready within 10
seconds, the driver will still issue a diagnostic reset.

Modify the driver to avoid sending a diag reset if the controller becomes
ready within the 10-second wait time.

Signed-off-by: Ranjan Kumar <ranjan.kumar@...adcom.com>
Link: https://lore.kernel.org/r/20240221071724.14986-1-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 447ac667f4b2b..7588c2c11a879 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -5584,7 +5584,9 @@ _base_wait_for_iocstate(struct MPT3SAS_ADAPTER *ioc, int timeout)
 		return -EFAULT;
 	}
 
- issue_diag_reset:
+	return 0;
+
+issue_diag_reset:
 	rc = _base_diag_reset(ioc);
 	return rc;
 }
-- 
2.43.0