[PATCH] i2c: scx200_acb remove use of lock_kernel

scx200_acb: remove use of lock_kernel()

Signed-off-by: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 7 insertions, 6 deletions

diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c
index 517a050625f1..02150bb25d43 100644
--- a/drivers/i2c/busses/scx200_acb.c
+++ b/drivers/i2c/busses/scx200_acb.c
@@ -378,6 +378,7 @@ static struct i2c_algorithm scx200_acb_algorithm = {
 };
 
 static struct scx200_acb_iface *scx200_acb_list;
+static DECLARE_MUTEX(scx200_acb_list_mutex);
 
 static int scx200_acb_probe(struct scx200_acb_iface *iface)
 {
@@ -463,10 +464,10 @@ static int  __init scx200_acb_create(int base, int index)
                 goto errout_release;
         }
 
-        lock_kernel();
+        down(&scx200_acb_list_mutex);
         iface->next = scx200_acb_list;
         scx200_acb_list = iface;
-        unlock_kernel();
+        up(&scx200_acb_list_mutex);
 
         return 0;
 
@@ -509,17 +510,17 @@ static void __exit scx200_acb_cleanup(void)
 {
         struct scx200_acb_iface *iface;
 
-        lock_kernel();
+        down(&scx200_acb_list_mutex);
         while ((iface = scx200_acb_list) != NULL) {
                 scx200_acb_list = iface->next;
-                unlock_kernel();
+                up(&scx200_acb_list_mutex);
 
                 i2c_del_adapter(&iface->adapter);
                 release_region(iface->base, 8);
                 kfree(iface);
-                lock_kernel();
+                down(&scx200_acb_list_mutex);
         }
-        unlock_kernel();
+        up(&scx200_acb_list_mutex);
 }
 
 module_init(scx200_acb_init);