diff mbox series

[03/10] qla2xxx: zero undefined mailbox IN registers

Message ID 20220713052045.10683-4-njavali@marvell.com
State New
Headers show
Series qla2xxx bug fixes | expand

Commit Message

Nilesh Javali July 13, 2022, 5:20 a.m. UTC 
From: Bikash Hazarika <bhazarika@marvell.com>

While requesting a new mailbox command, driver does not
write any data to unused registers.
Initialize the unused register value to zero while requesting
a new mailbox command to prevent stale entry access by firmware.

Cc: stable@vger.kernel.org
Signed-off-by: Bikash Hazarika <bhazarika@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
---
 drivers/scsi/qla2xxx/qla_mbx.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 643fa0052f5a..9a3f832c49ef 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -238,6 +238,8 @@  qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 			ql_dbg(ql_dbg_mbx, vha, 0x1112,
 			    "mbox[%d]<-0x%04x\n", cnt, *iptr);
 			wrt_reg_word(optr, *iptr);
+		} else {
+			wrt_reg_word(optr, 0);
 		}
 
 		mboxes >>= 1;