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net: irda: fix wait_until_sent poll timeout

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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: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zefan Li <lizefan@huawei.com>
This commit is contained in:
Johan Hovold 2015-03-04 10:39:03 +01:00 committed by Zefan Li
parent 7ebae41be6
commit 974de0a75b
1 changed files with 3 additions and 1 deletions
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4
net/irda/ircomm/ircomm_tty.c
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@ -843,7 +843,9 @@ 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) {