[SCSI] turn most scsi semaphores into mutexes

the scsi layer is using semaphores in a mutex way, this patch converts
these into using mutexes instead

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 19 insertions, 18 deletions

diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 10bcf42cb65..1067d77da10 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -33,6 +33,7 @@
 #include <linux/delay.h>
 #include <linux/kfifo.h>
 #include <linux/scatterlist.h>
+#include <linux/mutex.h>
 #include <net/tcp.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_device.h>
@@ -2300,10 +2301,10 @@ iscsi_xmitworker(void *data)
         /*
          * serialize Xmit worker on a per-connection basis.
          */
-        down(&conn->xmitsema);
+        mutex_lock(&conn->xmitmutex);
         if (iscsi_data_xmit(conn))
                 schedule_work(&conn->xmitwork);
-        up(&conn->xmitsema);
+        mutex_unlock(&conn->xmitmutex);
 }
 
 #define FAILURE_BAD_HOST                1
@@ -2367,11 +2368,11 @@ iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
                 session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
         spin_unlock(&session->lock);
 
-        if (!in_interrupt() && !down_trylock(&conn->xmitsema)) {
+        if (!in_interrupt() && mutex_trylock(&conn->xmitmutex)) {
                 spin_unlock_irq(host->host_lock);
                 if (iscsi_data_xmit(conn))
                         schedule_work(&conn->xmitwork);
-                up(&conn->xmitsema);
+                mutex_unlock(&conn->xmitmutex);
                 spin_lock_irq(host->host_lock);
         } else
                 schedule_work(&conn->xmitwork);
@@ -2531,7 +2532,7 @@ iscsi_conn_create(iscsi_sessionh_t sessionh, uint32_t conn_idx)
                 goto max_recv_dlenght_alloc_fail;
 
         init_timer(&conn->tmabort_timer);
-        init_MUTEX(&conn->xmitsema);
+        mutex_init(&conn->xmitmutex);
         init_waitqueue_head(&conn->ehwait);
 
         return iscsi_handle(conn);
@@ -2561,7 +2562,7 @@ iscsi_conn_destroy(iscsi_connh_t connh)
         struct iscsi_conn *conn = iscsi_ptr(connh);
         struct iscsi_session *session = conn->session;
 
-        down(&conn->xmitsema);
+        mutex_lock(&conn->xmitmutex);
         set_bit(SUSPEND_BIT, &conn->suspend_tx);
         if (conn->c_stage == ISCSI_CONN_INITIAL_STAGE && conn->sock) {
                 struct sock *sk = conn->sock->sk;
@@ -2592,7 +2593,7 @@ iscsi_conn_destroy(iscsi_connh_t connh)
         }
         spin_unlock_bh(&session->lock);
 
-        up(&conn->xmitsema);
+        mutex_unlock(&conn->xmitmutex);
 
         /*
          * Block until all in-progress commands for this connection
@@ -2796,7 +2797,7 @@ iscsi_conn_stop(iscsi_connh_t connh, int flag)
         set_bit(SUSPEND_BIT, &conn->suspend_rx);
         write_unlock_bh(&sk->sk_callback_lock);
 
-        down(&conn->xmitsema);
+        mutex_lock(&conn->xmitmutex);
 
         spin_lock_irqsave(session->host->host_lock, flags);
         spin_lock(&session->lock);
@@ -2878,7 +2879,7 @@ iscsi_conn_stop(iscsi_connh_t connh, int flag)
                         conn->datadgst_en = 0;
                 }
         }
-        up(&conn->xmitsema);
+        mutex_unlock(&conn->xmitmutex);
 }
 
 static int
@@ -3029,12 +3030,12 @@ iscsi_eh_abort(struct scsi_cmnd *sc)
          * 1) connection-level failure;
          * 2) recovery due protocol error;
          */
-        down(&conn->xmitsema);
+        mutex_lock(&conn->xmitmutex);
         spin_lock_bh(&session->lock);
         if (session->state != ISCSI_STATE_LOGGED_IN) {
                 if (session->state == ISCSI_STATE_TERMINATE) {
                         spin_unlock_bh(&session->lock);
-                        up(&conn->xmitsema);
+                        mutex_unlock(&conn->xmitmutex);
                         goto failed;
                 }
                 spin_unlock_bh(&session->lock);
@@ -3052,7 +3053,7 @@ iscsi_eh_abort(struct scsi_cmnd *sc)
                          * 2) session was re-open during time out of ctask.
                          */
                         spin_unlock_bh(&session->lock);
-                        up(&conn->xmitsema);
+                        mutex_unlock(&conn->xmitmutex);
                         goto success;
                 }
                 conn->tmabort_state = TMABORT_INITIAL;
@@ -3107,7 +3108,7 @@ iscsi_eh_abort(struct scsi_cmnd *sc)
                                     conn->tmabort_state == TMABORT_SUCCESS) {
                                         conn->tmabort_state = TMABORT_INITIAL;
                                         spin_unlock_bh(&session->lock);
-                                        up(&conn->xmitsema);
+                                        mutex_unlock(&conn->xmitmutex);
                                         goto success;
                                 }
                                 conn->tmabort_state = TMABORT_INITIAL;
@@ -3116,7 +3117,7 @@ iscsi_eh_abort(struct scsi_cmnd *sc)
                         spin_unlock_bh(&session->lock);
                 }
         }
-        up(&conn->xmitsema);
+        mutex_unlock(&conn->xmitmutex);
 
 
         /*
@@ -3182,7 +3183,7 @@ failed:
 exit:
         del_timer_sync(&conn->tmabort_timer);
 
-        down(&conn->xmitsema);
+        mutex_lock(&conn->xmitmutex);
         if (conn->sock) {
                 struct sock *sk = conn->sock->sk;
 
@@ -3190,7 +3191,7 @@ exit:
                 iscsi_ctask_cleanup(conn, ctask);
                 write_unlock_bh(&sk->sk_callback_lock);
         }
-        up(&conn->xmitsema);
+        mutex_unlock(&conn->xmitmutex);
         return rc;
 }
 
@@ -3601,9 +3602,9 @@ iscsi_conn_send_pdu(iscsi_connh_t connh, struct iscsi_hdr *hdr, char *data,
         struct iscsi_conn *conn = iscsi_ptr(connh);
         int rc;
 
-        down(&conn->xmitsema);
+        mutex_lock(&conn->xmitmutex);
         rc = iscsi_conn_send_generic(conn, hdr, data, data_size);
-        up(&conn->xmitsema);
+        mutex_unlock(&conn->xmitmutex);
 
         return rc;
 }