um: race fix: initialize delayed_work *before* registering IRQ
... since chan_interrupt() might schedule it if there's too much
incoming data. Kill task argument of chan_interrupt(), while
we are at it - it's always &line->task.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 08f6393..9299b8a 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -21,19 +21,10 @@
struct line *line = chan->line;
if (line)
- chan_interrupt(line, &line->task, line->tty, irq);
+ chan_interrupt(line, line->tty, irq);
return IRQ_HANDLED;
}
-static void line_timer_cb(struct work_struct *work)
-{
- struct line *line = container_of(work, struct line, task.work);
-
- if (!line->throttled)
- chan_interrupt(line, &line->task, line->tty,
- line->driver->read_irq);
-}
-
/*
* Returns the free space inside the ring buffer of this line.
*
@@ -327,8 +318,7 @@
struct line *line = tty->driver_data;
line->throttled = 0;
- chan_interrupt(line, &line->task, tty,
- line->driver->read_irq);
+ chan_interrupt(line, tty, line->driver->read_irq);
/*
* Maybe there is enough stuff pending that calling the interrupt
@@ -424,8 +414,6 @@
if (err) /* line_close() will be called by our caller */
goto out_unlock;
- INIT_DELAYED_WORK(&line->task, line_timer_cb);
-
if (!line->sigio) {
chan_enable_winch(line->chan_out, tty);
line->sigio = 1;