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authorVasu Dev <vasu.dev@intel.com>2011-10-28 11:34:17 -0700
committerJames Bottomley <JBottomley@Parallels.com>2011-10-31 13:27:19 +0400
commitb6e3c84034b93e6acc895711f74730e235dfe9d2 (patch)
treed4f80cd98ba82f5900a1f21ff9b623d86ed12c8f /drivers/scsi
parent14fc315fa30d128760c7edeff56530142576cd2e (diff)
[SCSI] libfc: avoid exchanges collision during lport reset
Currently timer delay is large and is using msleep to avoid avoid exchanges collision across lport reset, so instead do this by initializing exches pool indexes during reset also. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Tested-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/libfc/fc_exch.c4
-rw-r--r--drivers/scsi/libfc/fc_lport.c10
2 files changed, 5 insertions, 9 deletions
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 81235f36adc1..1b22130035da 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -1793,6 +1793,9 @@ restart:
goto restart;
}
}
+ pool->next_index = 0;
+ pool->left = FC_XID_UNKNOWN;
+ pool->right = FC_XID_UNKNOWN;
spin_unlock_bh(&pool->lock);
}
@@ -2281,6 +2284,7 @@ struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lport,
goto free_mempool;
for_each_possible_cpu(cpu) {
pool = per_cpu_ptr(mp->pool, cpu);
+ pool->next_index = 0;
pool->left = FC_XID_UNKNOWN;
pool->right = FC_XID_UNKNOWN;
spin_lock_init(&pool->lock);
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 628f347404f9..e0fb89133566 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -1030,16 +1030,8 @@ static void fc_lport_enter_reset(struct fc_lport *lport)
FCH_EVT_LIPRESET, 0);
fc_vports_linkchange(lport);
fc_lport_reset_locked(lport);
- if (lport->link_up) {
- /*
- * Wait upto resource allocation time out before
- * doing re-login since incomplete FIP exchanged
- * from last session may collide with exchanges
- * in new session.
- */
- msleep(lport->r_a_tov);
+ if (lport->link_up)
fc_lport_enter_flogi(lport);
- }
}
/**