Parallel port: convert port_mutex to the mutex API

Parallel port: Convert port_mutex to the mutex API

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/lp.c b/drivers/char/lp.c
index 81674d7..60ac642 100644 (file)
--- a/drivers/char/lp.c
+++ b/drivers/char/lp.c
@@ -312,7 +312,7 @@ static ssize_t lp_write(struct file * file, const char __user * buf,
        if (copy_size > LP_BUFFER_SIZE)
                copy_size = LP_BUFFER_SIZE;
 
-       if (down_interruptible (&lp_table[minor].port_mutex))
+       if (mutex_lock_interruptible(&lp_table[minor].port_mutex))
                return -EINTR;
 
        if (copy_from_user (kbuf, buf, copy_size)) {
@@ -399,7 +399,7 @@ static ssize_t lp_write(struct file * file, const char __user * buf,
                lp_release_parport (&lp_table[minor]);
        }
 out_unlock:
-       up (&lp_table[minor].port_mutex);
+       mutex_unlock(&lp_table[minor].port_mutex);
 
        return retv;
 }
@@ -421,7 +421,7 @@ static ssize_t lp_read(struct file * file, char __user * buf,
        if (count > LP_BUFFER_SIZE)
                count = LP_BUFFER_SIZE;
 
-       if (down_interruptible (&lp_table[minor].port_mutex))
+       if (mutex_lock_interruptible(&lp_table[minor].port_mutex))
                return -EINTR;
 
        lp_claim_parport_or_block (&lp_table[minor]);
@@ -479,7 +479,7 @@ static ssize_t lp_read(struct file * file, char __user * buf,
        if (retval > 0 && copy_to_user (buf, kbuf, retval))
                retval = -EFAULT;
 
-       up (&lp_table[minor].port_mutex);
+       mutex_unlock(&lp_table[minor].port_mutex);
 
        return retval;
 }
@@ -888,7 +888,7 @@ static int __init lp_init (void)
                lp_table[i].last_error = 0;
                init_waitqueue_head (&lp_table[i].waitq);
                init_waitqueue_head (&lp_table[i].dataq);
-               init_MUTEX (&lp_table[i].port_mutex);
+               mutex_init(&lp_table[i].port_mutex);
                lp_table[i].timeout = 10 * HZ;
        }
 

diff --git a/include/linux/lp.h b/include/linux/lp.h
index 7059b6b..0df024b 100644 (file)
--- a/include/linux/lp.h
+++ b/include/linux/lp.h
@@ -99,7 +99,7 @@
 #ifdef __KERNEL__
 
 #include <linux/wait.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 
 /* Magic numbers for defining port-device mappings */
 #define LP_PARPORT_UNSPEC -4
@@ -145,7 +145,7 @@ struct lp_struct {
 #endif
        wait_queue_head_t waitq;
        unsigned int last_error;
-       struct semaphore port_mutex;
+       struct mutex port_mutex;
        wait_queue_head_t dataq;
        long timeout;
        unsigned int best_mode;