X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Fchar%2Fn_hdlc.c;h=69ec6399c714b206ea11de8c30d8ba75fd0a9bd6;hb=4a90f09b20f4622dcbff1f0e1e6bae1704f8ad8c;hp=ed4e03333ab4646029f61236a554daa23a65a2df;hpb=f894d18380e7e7ff05f6622ccb75d2881922c6e9;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/char/n_hdlc.c b/drivers/char/n_hdlc.c
index ed4e03333ab..69ec6399c71 100644
--- a/drivers/char/n_hdlc.c
+++ b/drivers/char/n_hdlc.c
@@ -677,6 +677,10 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
 	/* 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);