target: Drop iSCSI use of mutex around max_cmd_sn increment

[cascardo/linux.git] / drivers / target / iscsi / iscsi_target_device.c

diff --git a/drivers/target/iscsi/iscsi_target_device.c b/drivers/target/iscsi/iscsi_target_device.c
index 5fabcd3..07d2ef6 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_device.c
+++ b/drivers/target/iscsi/iscsi_target_device.c
@@ -47,7 +47,7 @@ void iscsit_determine_maxcmdsn(struct iscsi_session *sess)
         * core_set_queue_depth_for_node().
         */
        sess->cmdsn_window = se_nacl->queue_depth;
-       sess->max_cmd_sn = (sess->max_cmd_sn + se_nacl->queue_depth) - 1;
+       atomic_set(&sess->max_cmd_sn, (u32) atomic_read(&sess->max_cmd_sn) + se_nacl->queue_depth - 1);
 }
 
 void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess)
@@ -57,9 +57,6 @@ void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess
 
        cmd->maxcmdsn_inc = 1;
 
-       mutex_lock(&sess->cmdsn_mutex);
-       sess->max_cmd_sn += 1;
-       pr_debug("Updated MaxCmdSN to 0x%08x\n", sess->max_cmd_sn);
-       mutex_unlock(&sess->cmdsn_mutex);
+       pr_debug("Updated MaxCmdSN to 0x%08x\n", atomic_inc_return(&sess->max_cmd_sn));
 }
 EXPORT_SYMBOL(iscsit_increment_maxcmdsn);