From: Jiri Slaby <jirislaby@gmail.com>

An omitted unlock.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/char/cyclades.c |    1 +
 1 files changed, 1 insertion(+)

diff -puN drivers/char/cyclades.c~char-cyclades-fix-deadlock drivers/char/cyclades.c
--- a/drivers/char/cyclades.c~char-cyclades-fix-deadlock
+++ a/drivers/char/cyclades.c
@@ -1061,6 +1061,7 @@ static void cyy_intr_chip(struct cyclade
 
 				if (data & info->ignore_status_mask) {
 					info->icount.rx++;
+					spin_unlock(&cinfo->card_lock);
 					return;
 				}
 				if (tty_buffer_request_room(tty, 1)) {
_