Input: sysrq - fix "stuck" SysRq mode

This shoud fix the problem with SysRq mode staying half-way enabled
and interfereing with normal PrtScrn operation after user presses ALT
for the first time.

Reported-and-tested-by: Éric Piel <E.A.B.Piel@tudelft.nl>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 5d15630a5830..5d64e3acb000 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -580,8 +580,12 @@ static bool sysrq_filter(struct input_handle *handle, unsigned int type,
         case KEY_RIGHTALT:
                 if (value)
                         sysrq_alt = code;
-                else if (sysrq_down && code == sysrq_alt_use)
-                        sysrq_down = false;
+                else {
+                        if (sysrq_down && code == sysrq_alt_use)
+                                sysrq_down = false;
+
+                        sysrq_alt = 0;
+                }
                 break;
 
         case KEY_SYSRQ: