[SCSI] zfcp: Simplify latency lock handling

The lock only needs to protect the softirq context called from qdio
against the userspace context called from sysfs. spin_lock and
spin_lock_bh is enough.

Acked-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 638cd5a2919d..cce698114b0b 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -2069,7 +2069,6 @@ static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
         struct fsf_qual_latency_info *lat_inf;
         struct latency_cont *lat;
         struct zfcp_unit *unit = req->unit;
-        unsigned long flags;
 
         lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
 
@@ -2087,11 +2086,11 @@ static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
                 return;
         }
 
-        spin_lock_irqsave(&unit->latencies.lock, flags);
+        spin_lock(&unit->latencies.lock);
         zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
         zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
         lat->counter++;
-        spin_unlock_irqrestore(&unit->latencies.lock, flags);
+        spin_unlock(&unit->latencies.lock);
 }
 
 #ifdef CONFIG_BLK_DEV_IO_TRACE