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authorJonathan Corbet <corbet@lwn.net>2008-05-15 10:37:16 -0600
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:47 -0600
commit2edbf8537edc62c9b0ef75e7025d01e8b6a48707 (patch)
treece6127e2a663c91603bf08cbeab59602f16bea19 /drivers/input/input.c
parent702e57d9ef7002f8d362faa6ddebc59e6d43fa05 (diff)
Input: cdev lock_kernel() pushdown
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/input/input.c')
-rw-r--r--drivers/input/input.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 27006fc1830..408df0bd6be 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -21,6 +21,7 @@
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/rcupdate.h>
+#include <linux/smp_lock.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_DESCRIPTION("Input core");
@@ -1588,13 +1589,17 @@ EXPORT_SYMBOL(input_unregister_handle);
static int input_open_file(struct inode *inode, struct file *file)
{
- struct input_handler *handler = input_table[iminor(inode) >> 5];
+ struct input_handler *handler;
const struct file_operations *old_fops, *new_fops = NULL;
int err;
+ lock_kernel();
/* No load-on-demand here? */
- if (!handler || !(new_fops = fops_get(handler->fops)))
- return -ENODEV;
+ handler = input_table[iminor(inode) >> 5];
+ if (!handler || !(new_fops = fops_get(handler->fops))) {
+ err = -ENODEV;
+ goto out;
+ }
/*
* That's _really_ odd. Usually NULL ->open means "nothing special",
@@ -1602,7 +1607,8 @@ static int input_open_file(struct inode *inode, struct file *file)
*/
if (!new_fops->open) {
fops_put(new_fops);
- return -ENODEV;
+ err = -ENODEV;
+ goto out;
}
old_fops = file->f_op;
file->f_op = new_fops;
@@ -1614,6 +1620,8 @@ static int input_open_file(struct inode *inode, struct file *file)
file->f_op = fops_get(old_fops);
}
fops_put(old_fops);
+out:
+ unlock_kernel();
return err;
}