diff options
| -rw-r--r-- | drivers/char/keyboard.c | 37 | ||||
| -rw-r--r-- | drivers/serial/kgdboc.c | 13 | ||||
| -rw-r--r-- | include/linux/kbd_kern.h | 1 |
3 files changed, 51 insertions, 0 deletions
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c index 12dc01ea7e35..8c456360da5f 100644 --- a/drivers/char/keyboard.c +++ b/drivers/char/keyboard.c @@ -380,6 +380,43 @@ static void to_utf8(struct vc_data *vc, uint c) } } +#ifdef CONFIG_KDB_KEYBOARD +static int kbd_clear_keys_helper(struct input_handle *handle, void *data) +{ + unsigned int *keycode = data; + input_inject_event(handle, EV_KEY, *keycode, 0); + return 0; +} + +static void kbd_clear_keys_callback(struct work_struct *dummy) +{ + unsigned int i, j, k; + + for (i = 0; i < ARRAY_SIZE(key_down); i++) { + if (!key_down[i]) + continue; + + k = i * BITS_PER_LONG; + + for (j = 0; j < BITS_PER_LONG; j++, k++) { + if (!test_bit(k, key_down)) + continue; + input_handler_for_each_handle(&kbd_handler, &k, + kbd_clear_keys_helper); + } + } +} + +static DECLARE_WORK(kbd_clear_keys_work, kbd_clear_keys_callback); + +/* Called to clear any key presses after resuming the kernel. */ +void kbd_dbg_clear_keys(void) +{ + schedule_work(&kbd_clear_keys_work); +} +EXPORT_SYMBOL_GPL(kbd_dbg_clear_keys); +#endif /* CONFIG_KDB_KEYBOARD */ + /* * Called after returning from RAW mode or when changing consoles - recompute * shift_down[] and shift_state from key_down[] maybe called when keymap is diff --git a/drivers/serial/kgdboc.c b/drivers/serial/kgdboc.c index a9a94ae72349..5af32b48d499 100644 --- a/drivers/serial/kgdboc.c +++ b/drivers/serial/kgdboc.c @@ -17,6 +17,7 @@ #include <linux/kdb.h> #include <linux/tty.h> #include <linux/console.h> +#include <linux/kbd_kern.h> #define MAX_CONFIG_LEN 40 @@ -35,12 +36,16 @@ static struct tty_driver *kgdb_tty_driver; static int kgdb_tty_line; #ifdef CONFIG_KDB_KEYBOARD +static bool kgdboc_use_kbd; + static int kgdboc_register_kbd(char **cptr) { + kgdboc_use_kbd = false; if (strncmp(*cptr, "kbd", 3) == 0) { if (kdb_poll_idx < KDB_POLL_FUNC_MAX) { kdb_poll_funcs[kdb_poll_idx] = kdb_get_kbd_char; kdb_poll_idx++; + kgdboc_use_kbd = true; if (cptr[0][3] == ',') *cptr += 4; else @@ -63,9 +68,16 @@ static void kgdboc_unregister_kbd(void) } } } + +static inline void kgdboc_clear_kbd(void) +{ + if (kgdboc_use_kbd) + kbd_dbg_clear_keys(); /* Release all pressed keys */ +} #else /* ! CONFIG_KDB_KEYBOARD */ #define kgdboc_register_kbd(x) 0 #define kgdboc_unregister_kbd() +#define kgdboc_clear_kbd() #endif /* ! CONFIG_KDB_KEYBOARD */ static int kgdboc_option_setup(char *opt) @@ -213,6 +225,7 @@ static void kgdboc_post_exp_handler(void) /* decrement the module count when the debugger detaches */ if (!kgdb_connected) module_put(THIS_MODULE); + kgdboc_clear_kbd(); } static struct kgdb_io kgdboc_io_ops = { diff --git a/include/linux/kbd_kern.h b/include/linux/kbd_kern.h index 506ad20c18f8..ae87c0ad4ce9 100644 --- a/include/linux/kbd_kern.h +++ b/include/linux/kbd_kern.h @@ -144,6 +144,7 @@ struct console; int getkeycode(unsigned int scancode); int setkeycode(unsigned int scancode, unsigned int keycode); void compute_shiftstate(void); +void kbd_dbg_clear_keys(void); /* defkeymap.c */ |