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Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/scsi/zfcp_fsf.c28
1 files changed, 14 insertions, 14 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index bd2b2376689..3f365ace771 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -645,30 +645,30 @@ static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
}
}
-static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
- __releases(&adapter->req_q_lock)
- __acquires(&adapter->req_q_lock)
+static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter)
{
struct zfcp_qdio_queue *req_q = &adapter->req_q;
- long ret;
- if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE)
- return -EIO;
- if (atomic_read(&req_q->count) > 0)
- return 0;
+ spin_lock_bh(&adapter->req_q_lock);
+ if (atomic_read(&req_q->count))
+ return 1;
+ spin_unlock_bh(&adapter->req_q_lock);
+ return 0;
+}
+
+static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
+{
+ long ret;
- atomic_dec(&req_q->count);
spin_unlock_bh(&adapter->req_q_lock);
ret = wait_event_interruptible_timeout(adapter->request_wq,
- atomic_read(&req_q->count) >= 0,
- 5 * HZ);
- spin_lock_bh(&adapter->req_q_lock);
- atomic_inc(&req_q->count);
-
+ zfcp_fsf_sbal_check(adapter), 5 * HZ);
if (ret > 0)
return 0;
if (!ret)
atomic_inc(&adapter->qdio_outb_full);
+
+ spin_lock_bh(&adapter->req_q_lock);
return -EIO;
}