[SERIAL] turn serial semaphores into mutexes

Turn several drivers/serial/ semaphores-used-as-mutex into mutexes

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 12 insertions, 11 deletions

diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c
index f330d6c0e0df..5f52883e64d2 100644
--- a/drivers/serial/pmac_zilog.c
+++ b/drivers/serial/pmac_zilog.c
@@ -60,6 +60,7 @@
 #include <linux/pmu.h>
 #include <linux/bitops.h>
 #include <linux/sysrq.h>
+#include <linux/mutex.h>
 #include <asm/sections.h>
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -96,7 +97,7 @@ MODULE_LICENSE("GPL");
  */
 static struct uart_pmac_port    pmz_ports[MAX_ZS_PORTS];
 static int                      pmz_ports_count;
-static DECLARE_MUTEX(pmz_irq_sem);
+static DEFINE_MUTEX(pmz_irq_mutex);
 
 static struct uart_driver pmz_uart_reg = {
         .owner          =       THIS_MODULE,
@@ -922,7 +923,7 @@ static int pmz_startup(struct uart_port *port)
         if (uap->node == NULL)
                 return -ENODEV;
 
-        down(&pmz_irq_sem);
+        mutex_lock(&pmz_irq_mutex);
 
         uap->flags |= PMACZILOG_FLAG_IS_OPEN;
 
@@ -940,11 +941,11 @@ static int pmz_startup(struct uart_port *port)
                 dev_err(&uap->dev->ofdev.dev,
                         "Unable to register zs interrupt handler.\n");
                 pmz_set_scc_power(uap, 0);
-                up(&pmz_irq_sem);
+                mutex_unlock(&pmz_irq_mutex);
                 return -ENXIO;
         }
 
-        up(&pmz_irq_sem);
+        mutex_unlock(&pmz_irq_mutex);
 
         /* Right now, we deal with delay by blocking here, I'll be
          * smarter later on
@@ -981,7 +982,7 @@ static void pmz_shutdown(struct uart_port *port)
         if (uap->node == NULL)
                 return;
 
-        down(&pmz_irq_sem);
+        mutex_lock(&pmz_irq_mutex);
 
         /* Release interrupt handler */
         free_irq(uap->port.irq, uap);
@@ -1002,7 +1003,7 @@ static void pmz_shutdown(struct uart_port *port)
 
         if (ZS_IS_CONS(uap) || ZS_IS_ASLEEP(uap)) {
                 spin_unlock_irqrestore(&port->lock, flags);
-                up(&pmz_irq_sem);
+                mutex_unlock(&pmz_irq_mutex);
                 return;
         }
 
@@ -1019,7 +1020,7 @@ static void pmz_shutdown(struct uart_port *port)
 
         spin_unlock_irqrestore(&port->lock, flags);
 
-        up(&pmz_irq_sem);
+        mutex_unlock(&pmz_irq_mutex);
 
         pmz_debug("pmz: shutdown() done.\n");
 }
@@ -1591,7 +1592,7 @@ static int pmz_suspend(struct macio_dev *mdev, pm_message_t pm_state)
 
         state = pmz_uart_reg.state + uap->port.line;
 
-        down(&pmz_irq_sem);
+        mutex_lock(&pmz_irq_mutex);
         down(&state->sem);
 
         spin_lock_irqsave(&uap->port.lock, flags);
@@ -1624,7 +1625,7 @@ static int pmz_suspend(struct macio_dev *mdev, pm_message_t pm_state)
         pmz_set_scc_power(uap, 0);
 
         up(&state->sem);
-        up(&pmz_irq_sem);
+        mutex_unlock(&pmz_irq_mutex);
 
         pmz_debug("suspend, switching complete\n");
 
@@ -1651,7 +1652,7 @@ static int pmz_resume(struct macio_dev *mdev)
 
         state = pmz_uart_reg.state + uap->port.line;
 
-        down(&pmz_irq_sem);
+        mutex_lock(&pmz_irq_mutex);
         down(&state->sem);
 
         spin_lock_irqsave(&uap->port.lock, flags);
@@ -1685,7 +1686,7 @@ static int pmz_resume(struct macio_dev *mdev)
 
  bail:
         up(&state->sem);
-        up(&pmz_irq_sem);
+        mutex_unlock(&pmz_irq_mutex);
 
         /* Right now, we deal with delay by blocking here, I'll be
          * smarter later on