net: irda: fix wait_until_sent poll timeout

commit 2c3fbe3cf28fbd7001545a92a83b4f8acfd9fa36 upstream.

In case an infinite timeout (0) is requested, the irda wait_until_sent
implementation would use a zero poll timeout rather than the default
200ms.

Note that wait_until_sent is currently never called with a 0-timeout
argument due to a bug in tty_wait_until_sent.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 41ac7938268be6ca07401bf0e9596c9e604444be..2ee29ed13bd41128c39504d9a0a37926988a098f 100644 (file)
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -820,7 +820,9 @@ static void ircomm_tty_wait_until_sent(struct tty_struct *tty, int timeout)
        orig_jiffies = jiffies;
 
        /* Set poll time to 200 ms */
-       poll_time = IRDA_MIN(timeout, msecs_to_jiffies(200));
+       poll_time = msecs_to_jiffies(200);
+       if (timeout)
+               poll_time = min_t(unsigned long, timeout, poll_time);
 
        spin_lock_irqsave(&self->spinlock, flags);
        while (self->tx_skb && self->tx_skb->len) {