From: Quinn Tran <qutran@marvell.com>
Date: Mon, 11 Jan 2021 01:31:32 -0800
Subject: scsi: qla2xxx: Fix mailbox Ch erroneous error
Patch-mainline: v5.12-rc1
Git-commit: 044c218b04503858ca4e17f61899c8baa0ae9ba1
References: bsc#1185491
Mailbox Ch/dump ram extend expects mb register 10 to be set. If not
set/clear, firmware can pick up garbage from previous invocation of this
mailbox. Example: mctp dump can set mb10. On subsequent flash read which
use mailbox cmd Ch, mb10 can retain previous value.
Link: https://lore.kernel.org/r/20210111093134.1206-6-njavali@marvell.com
Cc: stable@vger.kernel.org
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/scsi/qla2xxx/qla_dbg.c | 1 +
drivers/scsi/qla2xxx/qla_mbx.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -203,6 +203,7 @@ qla24xx_dump_ram(struct qla_hw_data *ha,
wrt_reg_word(®->mailbox0, MBC_DUMP_RISC_RAM_EXTENDED);
wrt_reg_word(®->mailbox1, LSW(addr));
wrt_reg_word(®->mailbox8, MSW(addr));
+ wrt_reg_word(®->mailbox10, 0);
wrt_reg_word(®->mailbox2, MSW(LSD(dump_dma)));
wrt_reg_word(®->mailbox3, LSW(LSD(dump_dma)));
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -4292,7 +4292,8 @@ qla2x00_dump_ram(scsi_qla_host_t *vha, d
if (MSW(addr) || IS_FWI2_CAPABLE(vha->hw)) {
mcp->mb[0] = MBC_DUMP_RISC_RAM_EXTENDED;
mcp->mb[8] = MSW(addr);
- mcp->out_mb = MBX_8|MBX_0;
+ mcp->mb[10] = 0;
+ mcp->out_mb = MBX_10|MBX_8|MBX_0;
} else {
mcp->mb[0] = MBC_DUMP_RISC_RAM;
mcp->out_mb = MBX_0;