diff options
Diffstat (limited to 'drivers/auxdisplay/panel.c')
| -rw-r--r-- | drivers/auxdisplay/panel.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c index df126dcdaf18..ea7869c0d7f9 100644 --- a/drivers/auxdisplay/panel.c +++ b/drivers/auxdisplay/panel.c @@ -1105,14 +1105,21 @@ static ssize_t keypad_read(struct file *file, static int keypad_open(struct inode *inode, struct file *file) { + int ret; + + ret = -EBUSY; if (!atomic_dec_and_test(&keypad_available)) - return -EBUSY; /* open only once at a time */ + goto fail; /* open only once at a time */ + ret = -EPERM; if (file->f_mode & FMODE_WRITE) /* device is read-only */ - return -EPERM; + goto fail; keypad_buflen = 0; /* flush the buffer on opening */ return 0; + fail: + atomic_inc(&keypad_available); + return ret; } static int keypad_release(struct inode *inode, struct file *file) @@ -1389,7 +1396,7 @@ static void panel_process_inputs(void) } } -static void panel_scan_timer(void) +static void panel_scan_timer(struct timer_list *unused) { if (keypad.enabled && keypad_initialized) { if (spin_trylock_irq(&pprt_lock)) { @@ -1414,7 +1421,7 @@ static void init_scan_timer(void) if (scan_timer.function) return; /* already started */ - setup_timer(&scan_timer, (void *)&panel_scan_timer, 0); + timer_setup(&scan_timer, panel_scan_timer, 0); scan_timer.expires = jiffies + INPUT_POLL_TIME; add_timer(&scan_timer); } |