luck/tmp_suning_uos_patched
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TTY: amiserial, use tty_port_close_end

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Hmm, the code was sleeping with interrupts disabled. This was not
good. Fix this by turning interrupts at an appropriate place. (The
race is protected by CLOSING flag.)

After the move, the code is identical to tty_port_close_end, so use
it!

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-03-05 14:52:48 +01:00 committed by Greg Kroah-Hartman
parent 6e1aeb0379
commit b8edebe4b8
1 changed files with 3 additions and 10 deletions
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13
drivers/tty/amiserial.c
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@ -1433,6 +1433,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
local_irq_restore(flags);
if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, port->closing_wait);
/*
@ -1461,17 +1462,9 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
port->tty = NULL;
if (port->blocked_open) {
if (port->close_delay) {
msleep_interruptible(jiffies_to_msecs(port->close_delay));
}
wake_up_interruptible(&port->open_wait);
}
port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&port->close_wait);
local_irq_restore(flags);
tty_port_close_end(port, tty);
}
/*