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scsi: qla2xxx: Zero undefined mailbox IN registers

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commit 6c96a3c7d4 upstream.

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.

Link: https://lore.kernel.org/r/20220713052045.10683-4-njavali@marvell.com
Cc: stable@vger.kernel.org
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bikash Hazarika <bhazarika@marvell.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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bikash Hazarika 2022-07-12 22:20:38 -07:00 • committed by Greg Kroah-Hartman
commit e63ea5814b
1 changed files with 2 additions and 0 deletions
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2
drivers/scsi/qla2xxx/qla_mbx.c
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@ -233,6 +233,8 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
ql_dbg(ql_dbg_mbx, vha, 0x1112, ql_dbg(ql_dbg_mbx, vha, 0x1112,
"mbox[%d]<-0x%04x\n", cnt, *iptr); "mbox[%d]<-0x%04x\n", cnt, *iptr);
wrt_reg_word(optr, *iptr); wrt_reg_word(optr, *iptr);
} else {
wrt_reg_word(optr, 0);
} }
mboxes >>= 1; mboxes >>= 1;