Messages in this thread Patch in this message | | | From | Pawel Moll <> | Subject | [RFC 02/18] power/reset: vexpress: Use sched_clock as the time source | Date | Mon, 23 Dec 2013 16:23:34 +0000 |
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At this stage of system shutdown procedure the jiffies may not be updated anymore, so have to base on raw sched_clock values.
Signed-off-by: Pawel Moll <pawel.moll@arm.com> Cc: Anton Vorontsov <anton@enomsg.org> Cc: David Woodhouse <dwmw2@infradead.org> --- drivers/power/reset/vexpress-poweroff.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/power/reset/vexpress-poweroff.c b/drivers/power/reset/vexpress-poweroff.c index 476aa49..d752233 100644 --- a/drivers/power/reset/vexpress-poweroff.c +++ b/drivers/power/reset/vexpress-poweroff.c @@ -15,6 +15,7 @@ #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/sched.h> #include <linux/stat.h> #include <linux/vexpress.h> @@ -27,12 +28,12 @@ static void vexpress_reset_do(struct device *dev, const char *what) vexpress_config_func_get_by_dev(dev); if (func) { - unsigned long timeout; + unsigned long long timeout_ns; err = vexpress_config_write(func, 0, 0); - timeout = jiffies + HZ; - while (time_before(jiffies, timeout)) + timeout_ns = sched_clock() + 50000000; + while (!err && time_before64(sched_clock(), timeout_ns)) cpu_relax(); } -- 1.8.3.2
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