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From: Guenter Roeck <linux@roeck-us.net>
To: Sebastian Reichel <sre@kernel.org>
Cc: linux-pm@vger.kernel.org,
	Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>,
	David Woodhouse <dwmw2@infradead.org>,
	Santosh Shilimkar <santosh.shilimkar@ti.com>,
	linux-kernel@vger.kernel.org, Guenter Roeck <linux@roeck-us.net>,
	Loc Ho <lho@apm.com>
Subject: [PATCH v2 05/10] power/reset: xgene: Use mdelay instead of jiffies based timeout
Date: Tue, 30 Sep 2014 10:48:31 -0700	[thread overview]
Message-ID: <1412099316-23167-6-git-send-email-linux@roeck-us.net> (raw)
In-Reply-To: <1412099316-23167-1-git-send-email-linux@roeck-us.net>

jiffies are not running at this stage of system shutdown, meaning an
error in the reset function would never be reported. Replace with mdelay().

Cc: Loc Ho <lho@apm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/power/reset/xgene-reboot.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/power/reset/xgene-reboot.c b/drivers/power/reset/xgene-reboot.c
index 1bab003..ae470b8 100644
--- a/drivers/power/reset/xgene-reboot.c
+++ b/drivers/power/reset/xgene-reboot.c
@@ -24,6 +24,7 @@
  * For system shutdown, this is board specify. If a board designer
  * implements GPIO shutdown, use the gpio-poweroff.c driver.
  */
+#include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/of_device.h>
 #include <linux/of_address.h>
@@ -43,15 +44,12 @@ static struct xgene_reboot_context *xgene_restart_ctx;
 static void xgene_restart(char str, const char *cmd)
 {
 	struct xgene_reboot_context *ctx = xgene_restart_ctx;
-	unsigned long timeout;
 
 	/* Issue the reboot */
 	if (ctx)
 		writel(ctx->mask, ctx->csr);
 
-	timeout = jiffies + HZ;
-	while (time_before(jiffies, timeout))
-		cpu_relax();
+	mdelay(1000);
 
 	dev_emerg(ctx->dev, "Unable to restart system\n");
 }
-- 
1.9.1

  parent reply	other threads:[~2014-09-30 17:48 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-30 17:48 [PATCH v2 00/10] power/reset: Register drivers with restart handler Guenter Roeck
2014-09-30 17:48 ` [PATCH v2 01/10] power/reset: vexpress: Register with kernel " Guenter Roeck
2014-09-30 17:48 ` [PATCH v2 02/10] power/reset: xgene: Return -ENOMEM if out of memory Guenter Roeck
2014-09-30 17:48 ` [PATCH v2 03/10] power/reset: xgene: Drop devm_kfree Guenter Roeck
2014-09-30 17:48 ` [PATCH v2 04/10] power/reset: xgene: Use local variable dev instead of pdev->dev Guenter Roeck
2014-09-30 17:48 ` Guenter Roeck [this message]
2014-09-30 17:48 ` [PATCH v2 06/10] power/reset: xgene: Register with kernel restart handler Guenter Roeck
2014-09-30 17:48 ` [PATCH v2 07/10] power/reset: axxia: " Guenter Roeck
2014-09-30 17:48 ` [PATCH v2 08/10] power/reset: keystone: " Guenter Roeck
2014-09-30 17:48 ` [PATCH v2 09/10] power/reset: hisi: " Guenter Roeck
2014-09-30 17:48 ` [PATCH v2 10/10] power/reset: brcmstb: " Guenter Roeck
2014-10-29  1:51   ` Brian Norris

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