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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-03-21 22:56:15 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-03-21 23:00:51 -0700 |
| commit | 2e2e3b96d98d5c17e9c09bc6088df3e182a71814 (patch) | |
| tree | 0ed49ca3ee60a9deb465d8aa4894365bd8d3030d /drivers/input/input.c | |
| parent | 13bad37b04c779d98983307a27f97e9caa36f9b1 (diff) | |
| download | lwn-2e2e3b96d98d5c17e9c09bc6088df3e182a71814.tar.gz lwn-2e2e3b96d98d5c17e9c09bc6088df3e182a71814.zip | |
Input: sparse-keymap - implement safer freeing of the keymap
Allow calling sparse_keymap_free() before unregistering input device
whithout risk of racing with EVIOCGETKEYCODE and EVIOCSETKEYCODE.
This makes life of drivers writers easier.
Acked-by: Yong Wang <yong.y.wang@intel.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/input.c')
| -rw-r--r-- | drivers/input/input.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c index e2aad0a51826..be18fa99fa24 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -659,7 +659,14 @@ static int input_default_setkeycode(struct input_dev *dev, int input_get_keycode(struct input_dev *dev, unsigned int scancode, unsigned int *keycode) { - return dev->getkeycode(dev, scancode, keycode); + unsigned long flags; + int retval; + + spin_lock_irqsave(&dev->event_lock, flags); + retval = dev->getkeycode(dev, scancode, keycode); + spin_unlock_irqrestore(&dev->event_lock, flags); + + return retval; } EXPORT_SYMBOL(input_get_keycode); |