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 6ca0bb949ad301a0ba109a73b342a1cb7833075f..2095153582f13a639ac6feeb19a8fe2a247a7ad1 100644 (file)
--- 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 @@ capi_ioctl(struct inode *inode, struct file *file,
 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