From: Paul Fulghum <paulkf@microgate.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [PATCH] make n_hdlc honor O_NONBLOCK on write
Date: Thu, 17 Jul 2008 08:55:00 -0500 [thread overview]
Message-ID: <1216302900.3842.4.camel@x2.microgate.com> (raw)
Make n_hdlc line discipline honor the O_NONBLOCK
file flag on write.
Signed-off-by: Paul Fulghum <paulkf@microgate.com>
--- a/drivers/char/n_hdlc.c 2008-07-17 08:39:15.000000000 -0500
+++ b/drivers/char/n_hdlc.c 2008-07-17 08:43:58.000000000 -0500
@@ -677,6 +677,10 @@ static ssize_t n_hdlc_tty_write(struct t
/* Allocate transmit buffer */
/* sleep until transmit buffer available */
while (!(tbuf = n_hdlc_buf_get(&n_hdlc->tx_free_buf_list))) {
+ if (file->f_flags & O_NONBLOCK) {
+ error = -EAGAIN;
+ break;
+ }
schedule();
n_hdlc = tty2n_hdlc (tty);
reply other threads:[~2008-07-17 15:09 UTC|newest]
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