Add ttydisc_rint_simple().

I noticed several drivers in our tree don't actually care about parity
and framing, such as pts(4), snp(4) (and my partially finished console
driver). Instead of duplicating a lot of code, I think we'd better add a
utility function for those drivers to quickly process a buffer of input.

Also change pts(4) and snp(4) to use this function.

1 files changed, 6 insertions, 19 deletions

diff --git a/sys/kern/tty_pts.c b/sys/kern/tty_pts.c
index d5045c1..c77cf2a 100644
--- a/sys/kern/tty_pts.c
+++ b/sys/kern/tty_pts.c
@@ -215,25 +215,12 @@ ptsdev_write(struct file *fp, struct uio *uio, struct ucred *active_cred,
 		 */
 		MPASS(iblen > 0);
 		do {
-			if (ttydisc_can_bypass(tp)) {
-				/* Store data at once. */
-				rintlen = ttydisc_rint_bypass(tp,
-				    ibstart, iblen);
-				ibstart += rintlen;
-				iblen -= rintlen;
-
-				if (iblen == 0) {
-					/* All data written. */
-					break;
-				}
-			} else {
-				error = ttydisc_rint(tp, *ibstart, 0);
-				if (error == 0) {
-					/* Character stored successfully. */
-					ibstart++;
-					iblen--;
-					continue;
-				}
+			rintlen = ttydisc_rint_simple(tp, ibstart, iblen);
+			ibstart += rintlen;
+			iblen -= rintlen;
+			if (iblen == 0) {
+				/* All data written. */
+				break;
 			}
 
 			/* Maybe the device isn't used anyway. */