From: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Date: Mon, 26 Nov 2018 20:57:23 +0000 (+1300)
Subject: tty/sysrq: Do not call sync directly from sysrq_do_reset()
X-Git-Tag: rel_imx_5.10.35_2.0.0-somdevices.0~5632^2~35
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=8fefbc6d4b26604be3ce627910a22aaeb7c382fd;p=linux.git

tty/sysrq: Do not call sync directly from sysrq_do_reset()

sysrq_do_reset() is called in softirq context, so it cannot call
sync() directly. Instead, call orderly_reboot(), which creates a work
item to run /sbin/reboot, or do emergency_sync and restart if the
command fails.

Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 28fb20e9f984..1f03078ec352 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -653,8 +653,7 @@ static void sysrq_do_reset(struct timer_list *t)
 
 	state->reset_requested = true;
 
-	ksys_sync();
-	kernel_restart(NULL);
+	orderly_reboot();
 }
 
 static void sysrq_handle_reset_request(struct sysrq_state *state)