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| author |   Fabio Estevam <festevam@gmail.com> | 2019-10-29 14:40:33 -0300 |
|---|---|---|
| committer |   Wim Van Sebroeck <wim@linux-watchdog.org> | 2019-11-18 19:53:44 +0100 |
| commit | 6083ab7b2f3f25022e2e8f4c42f14a8521f47873 (patch) | |
| tree | 71845e61289afd6672774758ad1e861edfafb506 /drivers/watchdog | |
| parent | watchdog: make nowayout sysfs file writable (diff) | |
| download | linux-dev-6083ab7b2f3f25022e2e8f4c42f14a8521f47873.tar.xz linux-dev-6083ab7b2f3f25022e2e8f4c42f14a8521f47873.zip | |
watchdog: imx7ulp: Fix reboot hang
The following hang is observed when a 'reboot' command is issued:
# reboot
# Stopping network: OK
Stopping klogd: OK
Stopping syslogd: OK
umount: devtmpfs busy - remounted read-only
[ 8.612079] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to all processes
Requesting system reboot
[ 10.694753] reboot: Restarting system
[ 11.699008] Reboot failed -- System halted
Fix this problem by adding a .restart ops member.
Fixes: 41b630f41bf7 ("watchdog: Add i.MX7ULP watchdog support")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20191029174037.25381-1-festevam@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/imx7ulp_wdt.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/watchdog/imx7ulp_wdt.c b/drivers/watchdog/imx7ulp_wdt.c index c73e37976799..0a87c6f4bab2 100644 --- a/drivers/watchdog/imx7ulp_wdt.c +++ b/drivers/watchdog/imx7ulp_wdt.c @@ -107,12 +107,28 @@ static int imx7ulp_wdt_set_timeout(struct watchdog_device *wdog, return 0; } +static int imx7ulp_wdt_restart(struct watchdog_device *wdog, + unsigned long action, void *data) +{ + struct imx7ulp_wdt_device *wdt = watchdog_get_drvdata(wdog); + + imx7ulp_wdt_enable(wdt->base, true); + imx7ulp_wdt_set_timeout(&wdt->wdd, 1); + + /* wait for wdog to fire */ + while (true) + ; + + return NOTIFY_DONE; +} + static const struct watchdog_ops imx7ulp_wdt_ops = { .owner = THIS_MODULE, .start = imx7ulp_wdt_start, .stop = imx7ulp_wdt_stop, .ping = imx7ulp_wdt_ping, .set_timeout = imx7ulp_wdt_set_timeout, + .restart = imx7ulp_wdt_restart, }; static const struct watchdog_info imx7ulp_wdt_info = { |