[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>

diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c
index 517a050625f19b8abb1eddc31a8bc893ea4af5b8..02150bb25d4305a2212f00f667e37f2e4e722e81 100644 (file)
--- 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);