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[SCSI] lpfc 8.3.36: Fix bug with Target Resets and FCP2 devices

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Fix bug with Target Resets and FCP2 devices

Create module parameter to disable Target Reset on FCP-Tape devices
when a "bus reset" is requested. Default is to reset all devices on
bus reset.

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
James Smart
2012-10-31 14:44:42 -04:00
committed by James Bottomley
parent c71ab8616d
commit a6571c6eba
3 changed files with 16 additions and 0 deletions
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12
drivers/scsi/lpfc/lpfc_attr.c
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@@ -3858,6 +3858,16 @@ LPFC_ATTR_R(ack0, 0, 0, 1, "Enable ACK0 support");
LPFC_ATTR_RW(fcp_io_sched, 0, 0, 1, "Determine scheduling algrithmn for "
"issuing commands [0] - Round Robin, [1] - Current CPU");
/*
# lpfc_fcp2_no_tgt_reset: Determine bus reset behavior
# range is [0,1]. Default value is 0.
# For [0], bus reset issues target reset to ALL devices
# For [1], bus reset issues target reset to non-FCP2 devices
*/
LPFC_ATTR_RW(fcp2_no_tgt_reset, 0, 0, 1, "Determine bus reset behavior for "
"FCP2 devices [0] - issue tgt reset, [1] - no tgt reset");
/*
# lpfc_cr_delay & lpfc_cr_count: Default values for I/O colaesing
# cr_delay (msec) or cr_count outstanding commands. cr_delay can take
@@ -4100,6 +4110,7 @@ struct device_attribute *lpfc_hba_attrs[] = {
&dev_attr_lpfc_scan_down,
&dev_attr_lpfc_link_speed,
&dev_attr_lpfc_fcp_io_sched,
&dev_attr_lpfc_fcp2_no_tgt_reset,
&dev_attr_lpfc_cr_delay,
&dev_attr_lpfc_cr_count,
&dev_attr_lpfc_multi_ring_support,
@@ -5091,6 +5102,7 @@ void
lpfc_get_cfgparam(struct lpfc_hba *phba)
{
lpfc_fcp_io_sched_init(phba, lpfc_fcp_io_sched);
lpfc_fcp2_no_tgt_reset_init(phba, lpfc_fcp2_no_tgt_reset);
lpfc_cr_delay_init(phba, lpfc_cr_delay);
lpfc_cr_count_init(phba, lpfc_cr_count);
lpfc_multi_ring_support_init(phba, lpfc_multi_ring_support);