tty: Fix comments for tty_ldisc_get()
tty_ldisc_get() returns ERR_PTR() values if unsuccessful, not NULL;
fix function header documentation.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index b2e8210..4008f5f 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -140,9 +140,16 @@
* @disc: ldisc number
*
* Takes a reference to a line discipline. Deals with refcounts and
- * module locking counts. Returns NULL if the discipline is not available.
- * Returns a pointer to the discipline and bumps the ref count if it is
- * available
+ * module locking counts.
+ *
+ * Returns: -EINVAL if the discipline index is not [N_TTY..NR_LDISCS] or
+ * if the discipline is not registered
+ * -EAGAIN if request_module() failed to load or register the
+ * the discipline
+ * -ENOMEM if allocation failure
+ *
+ * Otherwise, returns a pointer to the discipline and bumps the
+ * ref count
*
* Locking:
* takes tty_ldiscs_lock to guard against ldisc races