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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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1
drivers/scsi/lpfc/lpfc.h
View file

@ -689,6 +689,7 @@ struct lpfc_hba {
#define LPFC_FCF_PRIORITY 2 /* Priority fcf failover */
uint32_t cfg_fcf_failover_policy;
uint32_t cfg_fcp_io_sched;
uint32_t cfg_fcp2_no_tgt_reset;
uint32_t cfg_cr_delay;
uint32_t cfg_cr_count;
uint32_t cfg_multi_ring_support;

12
drivers/scsi/lpfc/lpfc_attr.c
View file

@ -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);

3
drivers/scsi/lpfc/lpfc_scsi.c
View file

@ -4914,6 +4914,9 @@ lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
if (!NLP_CHK_NODE_ACT(ndlp))
continue;
if (vport->phba->cfg_fcp2_no_tgt_reset &&
(ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
continue;
if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
ndlp->nlp_sid == i &&
ndlp->rport) {