CAPI: BKL pushdown
Put explicit lock_kernel() calls into capi_open()
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index 6ca0bb9..2095153 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -20,6 +20,7 @@
#include <linux/signal.h>
#include <linux/mutex.h>
#include <linux/mm.h>
+#include <linux/smp_lock.h>
#include <linux/timer.h>
#include <linux/wait.h>
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
@@ -983,13 +984,17 @@
static int
capi_open(struct inode *inode, struct file *file)
{
+ int ret;
+
+ lock_kernel();
if (file->private_data)
- return -EEXIST;
-
- if ((file->private_data = capidev_alloc()) == NULL)
- return -ENOMEM;
-
- return nonseekable_open(inode, file);
+ ret = -EEXIST;
+ else if ((file->private_data = capidev_alloc()) == NULL)
+ ret = -ENOMEM;
+ else
+ ret = nonseekable_open(inode, file);
+ unlock_kernel();
+ return ret;
}
static int