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[SCSI] qla2xxx: Add loopback IDC-TIME-EXTEND aen handling support.

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Earlier IDC-TIME-EXTEND aen was a nop and ignored by driver.
We now have to handle the aen so that other protocol drivers can use time
extension during some loopback operations.

Signed-off-by: Santosh Vernekar <santosh.vernekar@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Santosh Vernekar
2013-08-27 01:37:48 -04:00
committed by James Bottomley
parent f875cd4cc4
commit 454073c905
4 changed files with 48 additions and 21 deletions
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17
drivers/scsi/qla2xxx/qla_bsg.c
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@@ -627,6 +627,7 @@ qla81xx_set_loopback_mode(scsi_qla_host_t *vha, uint16_t *config,
{
int ret = 0;
int rval = 0;
unsigned long rem_tmo = 0, current_tmo = 0;
struct qla_hw_data *ha = vha->hw;
if (!IS_QLA81XX(ha) && !IS_QLA8031(ha) && !IS_QLA8044(ha))
@@ -652,8 +653,19 @@ qla81xx_set_loopback_mode(scsi_qla_host_t *vha, uint16_t *config,
}
/* Wait for DCBX complete event */
if (!wait_for_completion_timeout(&ha->dcbx_comp,
(DCBX_COMP_TIMEOUT * HZ))) {
current_tmo = DCBX_COMP_TIMEOUT * HZ;
while (1) {
rem_tmo = wait_for_completion_timeout(&ha->dcbx_comp,
current_tmo);
if (!ha->idc_extend_tmo || rem_tmo) {
ha->idc_extend_tmo = 0;
break;
}
current_tmo = ha->idc_extend_tmo * HZ;
ha->idc_extend_tmo = 0;
}
if (!rem_tmo) {
ql_dbg(ql_dbg_user, vha, 0x7022,
"DCBX completion not received.\n");
ret = qla81xx_reset_loopback_mode(vha, new_config, 0, 0);
@@ -678,6 +690,7 @@ qla81xx_set_loopback_mode(scsi_qla_host_t *vha, uint16_t *config,
}
ha->notify_dcbx_comp = 0;
ha->idc_extend_tmo = 0;
done_set_internal:
return rval;