[SCSI] zfcp: Remove global config_mutex

The global config_mutex was required for the serialization of a
configuration change within the zfcp driver.  This global locking is
now obsolete and can be removed.  The requirement of serializing the
access to a zfcp_adapter reference via a ccw_device is realized wth a
static spinlock.

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

1 files changed, 0 insertions, 3 deletions

diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index 6fa1bcbec0a9..3e3e72cc724b 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -622,8 +622,6 @@ static int zfcp_fc_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries)
                 return -E2BIG;
         }
 
-        mutex_lock(&zfcp_data.config_mutex);
-
         /* first entry is the header */
         for (x = 1; x < max_entries && !last; x++) {
                 if (x % (ZFCP_GPN_FT_ENTRIES + 1))
@@ -655,7 +653,6 @@ static int zfcp_fc_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries)
         list_for_each_entry_safe(port, tmp, &adapter->port_list, list)
                 zfcp_fc_validate_port(port, &remove_lh);
         write_unlock_irqrestore(&adapter->port_list_lock, flags);
-        mutex_unlock(&zfcp_data.config_mutex);
 
         list_for_each_entry_safe(port, tmp, &remove_lh, list) {
                 zfcp_erp_port_shutdown(port, 0, "fcegpf2", NULL);