From: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Date: Thu, 30 Jul 2020 13:33:43 +0530
Subject: scsi: mpt3sas: Memset config_cmds.reply buffer with zeros
Git-commit: f09219e48b401c961f9d2f8f97a0c0b55b7894e1
Patch-mainline: v5.10-rc1
References: jsc#SLE-16914

Currently config_cmds.reply buffer is not memset to zero before posting
config page request message.  In some cases, for the current config
request, the previous config reply is getting processed and we will observe
PageType mismatch between request to reply buffer. It will be difficult to
debug this type of issue and it confuses by thinking that HBA Firmware
itself posted the wrong config reply.  So it is better to memset the
config_cmds.reply buffer with zeros before issuing the config request.

Link: https://lore.kernel.org/r/1596096229-3341-2-git-send-email-suganath-prabu.subramani@broadcom.com
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/mpt3sas/mpt3sas_config.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_config.c b/drivers/scsi/mpt3sas/mpt3sas_config.c
index 11026e0ef3d0..4a0ddc7c95e4 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_config.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_config.c
@@ -371,7 +371,7 @@ _config_request(struct MPT3SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
 	}
 
 	r = 0;
-	memset(mpi_reply, 0, sizeof(Mpi2ConfigReply_t));
+	memset(ioc->config_cmds.reply, 0, sizeof(Mpi2ConfigReply_t));
 	ioc->config_cmds.status = MPT3_CMD_PENDING;
 	config_request = mpt3sas_base_get_msg_frame(ioc, smid);
 	ioc->config_cmds.smid = smid;