diff options
Diffstat (limited to 'drivers/staging/speakup/selection.c')
-rw-r--r-- | drivers/staging/speakup/selection.c | 38 |
1 files changed, 32 insertions, 6 deletions
diff --git a/drivers/staging/speakup/selection.c b/drivers/staging/speakup/selection.c index f0fb00392d6..f67941e78e4 100644 --- a/drivers/staging/speakup/selection.c +++ b/drivers/staging/speakup/selection.c @@ -4,6 +4,8 @@ #include <linux/sched.h> #include <linux/device.h> /* for dev_warn */ #include <linux/selection.h> +#include <linux/workqueue.h> +#include <asm/cmpxchg.h> #include "speakup.h" @@ -121,20 +123,24 @@ int speakup_set_selection(struct tty_struct *tty) return 0; } -/* TODO: move to some helper thread, probably. That'd fix having to check for - * in_atomic(). */ -int speakup_paste_selection(struct tty_struct *tty) +struct speakup_paste_work { + struct work_struct work; + struct tty_struct *tty; +}; + +static void __speakup_paste_selection(struct work_struct *work) { + struct speakup_paste_work *spw = + container_of(work, struct speakup_paste_work, work); + struct tty_struct *tty = xchg(&spw->tty, NULL); struct vc_data *vc = (struct vc_data *) tty->driver_data; int pasted = 0, count; DECLARE_WAITQUEUE(wait, current); + add_wait_queue(&vc->paste_wait, &wait); while (sel_buffer && sel_buffer_lth > pasted) { set_current_state(TASK_INTERRUPTIBLE); if (test_bit(TTY_THROTTLED, &tty->flags)) { - if (in_atomic()) - /* if we are in an interrupt handler, abort */ - break; schedule(); continue; } @@ -146,6 +152,26 @@ int speakup_paste_selection(struct tty_struct *tty) } remove_wait_queue(&vc->paste_wait, &wait); current->state = TASK_RUNNING; + tty_kref_put(tty); +} + +static struct speakup_paste_work speakup_paste_work = { + .work = __WORK_INITIALIZER(speakup_paste_work.work, + __speakup_paste_selection) +}; + +int speakup_paste_selection(struct tty_struct *tty) +{ + if (cmpxchg(&speakup_paste_work.tty, NULL, tty) != NULL) + return -EBUSY; + + tty_kref_get(tty); + schedule_work_on(WORK_CPU_UNBOUND, &speakup_paste_work.work); return 0; } +void speakup_cancel_paste(void) +{ + cancel_work_sync(&speakup_paste_work.work); + tty_kref_put(speakup_paste_work.tty); +} |