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[SCSI] qla2xxx: Correctly read sfp single byte mailbox register.

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When reading a single byte using the READ SFP mailbox command, the
single byte of data is returned in MB[1] and not MB[8].

The reason that MB[8] was being used is that the spec was unclear
as it evolved over time; and we have not needed to read a single
byte until recently.

Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Joe Carnuccio 2011-05-10 11:30:11 -07:00 committed by James Bottomley
parent d652e09370
commit 1bff6cc8fb
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/qla2xxx/qla_mbx.c
View file

@ -3608,14 +3608,14 @@ qla2x00_read_edc(scsi_qla_host_t *vha, uint16_t dev, uint16_t adr,
mcp->mb[9] = adr;
mcp->mb[10] = opt;
mcp->out_mb = MBX_10|MBX_9|MBX_8|MBX_7|MBX_6|MBX_3|MBX_2|MBX_1|MBX_0;
mcp->in_mb = MBX_0;
mcp->in_mb = MBX_1|MBX_0;
mcp->tov = MBX_TOV_SECONDS;
mcp->flags = 0;
rval = qla2x00_mailbox_command(vha, mcp);
if (opt & BIT_0)
if (sfp)
*sfp = mcp->mb[8];
*sfp = mcp->mb[1];
if (rval != QLA_SUCCESS) {
DEBUG2_3_11(printk("%s(%ld): failed=%x (%x).\n", __func__,