The port_sem is already used as a mutex since it's using DECLARE_MUTEX(), but
the underlying construct is still a semaphore .. This patch switches it over
to a struct mutex.
Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
#include "linux/completion.h"
#include "linux/interrupt.h"
#include "linux/list.h"
#include "linux/completion.h"
#include "linux/interrupt.h"
#include "linux/list.h"
+#include "linux/mutex.h"
#include "asm/atomic.h"
#include "init.h"
#include "irq_kern.h"
#include "asm/atomic.h"
#include "init.h"
#include "irq_kern.h"
-static DECLARE_MUTEX(ports_sem);
+static DEFINE_MUTEX(ports_mutex);
static LIST_HEAD(ports);
static void port_work_proc(struct work_struct *unused)
static LIST_HEAD(ports);
static void port_work_proc(struct work_struct *unused)
struct port_dev *dev = NULL;
int fd;
struct port_dev *dev = NULL;
int fd;
+ mutex_lock(&ports_mutex);
list_for_each(ele, &ports) {
port = list_entry(ele, struct port_list, list);
if (port->port == port_num)
list_for_each(ele, &ports) {
port = list_entry(ele, struct port_list, list);
if (port->port == port_num)
out_free:
kfree(port);
out:
out_free:
kfree(port);
out:
+ mutex_unlock(&ports_mutex);