Remove unused tty_gone() checks inside ttyoutq_read_uio().

When my earlier MPSAFE TTY prototypes still implemented line
disciplines, we needed a mechanism to abort read()'s on PTY master
devices when inside the line discipline. Because this is no longer the
case, these checks have become unneeded.

1 files changed, 0 insertions, 11 deletions

diff --git a/sys/kern/tty_outq.c b/sys/kern/tty_outq.c
index e945cca..30df4eb 100644
--- a/sys/kern/tty_outq.c
+++ b/sys/kern/tty_outq.c
@@ -250,12 +250,6 @@ ttyoutq_read_uio(struct ttyoutq *to, struct tty *tp, struct uio *uio)
 			error = uiomove(tob->tob_data + cbegin, clen, uio);
 			tty_lock(tp);
 
-			if (tty_gone(tp)) {
-				/* We lost the discipline. */
-				uma_zfree(ttyoutq_zone, tob);
-				return (ENXIO);
-			}
-
 			/* Block can now be readded to the list. */
 			/*
 			 * XXX: we could remove the blocks here when the
@@ -282,11 +276,6 @@ ttyoutq_read_uio(struct ttyoutq *to, struct tty *tp, struct uio *uio)
 			error = uiomove(ob, clen, uio);
 			tty_lock(tp);
 
-			if (tty_gone(tp)) {
-				/* We lost the discipline. */
-				return (ENXIO);
-			}
-
 			if (error != 0)
 				return (error);
 		}