linux-kernel - [PATCH 3.19.y-ckt 107/156] watchdog: sunxi: fix activation of system reset

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Message-Id: <1445377097-9921-108-git-send-email-kamal@canonical.com>
Date:	Tue, 20 Oct 2015 14:37:28 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Francesco Lavra <francescolavra.fl@...il.com>,
	Wim Van Sebroeck <wim@...ana.be>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 107/156] watchdog: sunxi: fix activation of system reset

3.19.8-ckt8 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Francesco Lavra <francescolavra.fl@...il.com>

commit 0919e4445190da18496d31aac08b90828a47d45f upstream.

Commit f2147de33470 ("watchdog: sunxi: support parameterized compatible
strings") introduced a regression in sunxi_wdt_start(), by which
the system reset function of the watchdog is not enabled upon
starting the watchdog. As a result, the system is not reset when the
watchdog expires. Fix it.

Fixes: f2147de33470 ("watchdog: sunxi: support parameterized compatible strings")
Signed-off-by: Francesco Lavra <francescolavra.fl@...il.com>
Acked-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/watchdog/sunxi_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/sunxi_wdt.c b/drivers/watchdog/sunxi_wdt.c
index a29afb3..47bd8a1 100644
--- a/drivers/watchdog/sunxi_wdt.c
+++ b/drivers/watchdog/sunxi_wdt.c
@@ -184,7 +184,7 @@ static int sunxi_wdt_start(struct watchdog_device *wdt_dev)
 	/* Set system reset function */
 	reg = readl(wdt_base + regs->wdt_cfg);
 	reg &= ~(regs->wdt_reset_mask);
-	reg |= ~(regs->wdt_reset_val);
+	reg |= regs->wdt_reset_val;
 	writel(reg, wdt_base + regs->wdt_cfg);
 
 	/* Enable watchdog */
-- 
1.9.1

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