[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>

1 files changed, 4 insertions, 0 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);