Messages in this thread Patch in this message | | | Subject | [PATCH] make n_hdlc honor O_NONBLOCK on write | From | Paul Fulghum <> | Date | Thu, 17 Jul 2008 08:55:00 -0500 |
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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);
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