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Commit f95499c3 authored by Peter Hurley's avatar Peter Hurley Committed by Greg Kroah-Hartman

n_tty: Don't wait for buffer work in read() loop

User-space read() can run concurrently with receiving from device;
waiting for receive_buf() to complete is not required.
Signed-off-by: default avatarPeter Hurley <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent d1913e39
......@@ -1724,7 +1724,6 @@ static inline int input_available_p(struct tty_struct *tty, int amt)
struct n_tty_data *ldata = tty->disc_data;
if (ldata->icanon && !L_EXTPROC(tty)) {
if (ldata->canon_head != ldata->read_tail)
return 1;
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