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path: root/drivers/tty/n_tty.c
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Diffstat (limited to 'drivers/tty/n_tty.c')
-rw-r--r--drivers/tty/n_tty.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 8933ef1f83c0..efc72104c840 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1329,7 +1329,7 @@ handle_newline:
put_tty_queue(c, ldata);
smp_store_release(&ldata->canon_head, ldata->read_head);
kill_fasync(&tty->fasync, SIGIO, POLL_IN);
- wake_up_interruptible_poll(&tty->read_wait, EPOLLIN);
+ wake_up_interruptible_poll(&tty->read_wait, EPOLLIN | EPOLLRDNORM);
return;
}
}
@@ -1561,7 +1561,7 @@ static void __receive_buf(struct tty_struct *tty, const unsigned char *cp,
if (read_cnt(ldata)) {
kill_fasync(&tty->fasync, SIGIO, POLL_IN);
- wake_up_interruptible_poll(&tty->read_wait, EPOLLIN);
+ wake_up_interruptible_poll(&tty->read_wait, EPOLLIN | EPOLLRDNORM);
}
}
@@ -1926,7 +1926,7 @@ static bool canon_copy_from_read_buf(struct tty_struct *tty,
return false;
canon_head = smp_load_acquire(&ldata->canon_head);
- n = min(*nr + 1, canon_head - ldata->read_tail);
+ n = min(*nr, canon_head - ldata->read_tail);
tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1);
size = min_t(size_t, tail + n, N_TTY_BUF_SIZE);
@@ -1948,10 +1948,8 @@ static bool canon_copy_from_read_buf(struct tty_struct *tty,
n += N_TTY_BUF_SIZE;
c = n + found;
- if (!found || read_buf(ldata, eol) != __DISABLED_CHAR) {
- c = min(*nr, c);
+ if (!found || read_buf(ldata, eol) != __DISABLED_CHAR)
n = c;
- }
n_tty_trace("%s: eol:%zu found:%d n:%zu c:%zu tail:%zu more:%zu\n",
__func__, eol, found, n, c, tail, more);