scsi: qla2xxx: Fix mailbox Ch erroneous error

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>

drivers/scsi/qla2xxx/qla_dbg.c

@@ -202,6 +202,7 @@ qla24xx_dump_ram(struct qla_hw_data *ha, uint32_t addr, __be32 *ram,
 		wrt_reg_word(&reg->mailbox0, MBC_DUMP_RISC_RAM_EXTENDED);
 		wrt_reg_word(&reg->mailbox1, LSW(addr));
 		wrt_reg_word(&reg->mailbox8, MSW(addr));
+		wrt_reg_word(&reg->mailbox10, 0);
 
 		wrt_reg_word(&reg->mailbox2, MSW(LSD(dump_dma)));
 		wrt_reg_word(&reg->mailbox3, LSW(LSD(dump_dma)));

drivers/scsi/qla2xxx/qla_mbx.c

@@ -4291,7 +4291,8 @@ qla2x00_dump_ram(scsi_qla_host_t *vha, dma_addr_t req_dma, uint32_t addr,
 	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;