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Message-ID: <20150327075326.GA24918@spo001.leaseweb.nl>
Date: Fri, 27 Mar 2015 08:53:26 +0100
From: Wim Van Sebroeck <wim@...ana.be>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>,
Linux Watchdog Mailing List <linux-watchdog@...r.kernel.org>,
Guenter Roeck <linux@...ck-us.net>,
Dan Carpenter <dan.carpenter@...cle.com>,
James Hogan <james.hogan@...tec.com>
Subject: [GIT PULL REQUEST] watchdog - v4.0-rc5 Fixes
Hi Linus,
Please pull from 'master' branch of
git://www.linux-watchdog.org/linux-watchdog.git
It will fix the following issues:
* mtk_wdt: signedness bug in mtk_wdt_start()
* imgpdc: Fix probe NULL pointer dereference during probe and fix the default heartbeat
This will update the following files:
imgpdc_wdt.c | 8 ++++----
mtk_wdt.c | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)
with these Changes:
commit ae6ee2fd47f76db5a1cd02c23378057bd21c2c8d
Author: James Hogan <james.hogan@...tec.com>
Date: Fri Feb 20 23:45:45 2015 +0000
watchdog: imgpdc: Fix default heartbeat
The IMG PDC watchdog driver heartbeat module parameter has no default so
it is initialised to zero. This results in the following warning during
probe:
imgpdc-wdt 2006000.wdt: Initial timeout out of range! setting max timeout
The module parameter description implies that the default value should
be PDC_WDT_DEF_TIMEOUT, which isn't yet used, so initialise it to that.
Also tweak the heartbeat module parameter description for consistency.
Fixes: 93937669e9b5 ("watchdog: ImgTec PDC Watchdog Timer Driver")
Signed-off-by: James Hogan <james.hogan@...tec.com>
Cc: Ezequiel Garcia <ezequiel.garcia@...tec.com>
Cc: Naidu Tellapati <Naidu.Tellapati@...tec.com>
Cc: Jude Abraham <Jude.Abraham@...tec.com>
Cc: linux-watchdog@...r.kernel.org
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
commit a629c08fdb98ebb184d745553af9dda4f05941bf
Author: James Hogan <james.hogan@...tec.com>
Date: Fri Feb 20 23:45:44 2015 +0000
watchdog: imgpdc: Fix probe NULL pointer dereference
The IMG PDC watchdog probe function calls pdc_wdt_stop() prior to
watchdog_set_drvdata(), causing a NULL pointer dereference when
pdc_wdt_stop() retrieves the struct pdc_wdt_dev pointer using
watchdog_get_drvdata() and reads the register base address through it.
Fix by moving the watchdog_set_drvdata() call earlier, to where various
other pdc_wdt->wdt_dev fields are initialised.
Fixes: 93937669e9b5 ("watchdog: ImgTec PDC Watchdog Timer Driver")
Signed-off-by: James Hogan <james.hogan@...tec.com>
Cc: Ezequiel Garcia <ezequiel.garcia@...tec.com>
Cc: Naidu Tellapati <Naidu.Tellapati@...tec.com>
Cc: Jude Abraham <Jude.Abraham@...tec.com>
Cc: linux-watchdog@...r.kernel.org
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
commit 9ffd906d9a6e50c958bd99971d762a426a12a36a
Author: Dan Carpenter <dan.carpenter@...cle.com>
Date: Wed Feb 11 13:26:21 2015 +0300
watchdog: mtk_wdt: signedness bug in mtk_wdt_start()
"ret" should be signed for the error handling to work correctly. This
doesn't matter much in real life since mtk_wdt_set_timeout() always
succeeds.
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
For completeness, I added the overal diff below.
Greetings,
Wim.
================================================================================
diff --git a/drivers/watchdog/imgpdc_wdt.c b/drivers/watchdog/imgpdc_wdt.c
index c8def68..0deaa4f 100644
--- a/drivers/watchdog/imgpdc_wdt.c
+++ b/drivers/watchdog/imgpdc_wdt.c
@@ -42,10 +42,10 @@
#define PDC_WDT_MIN_TIMEOUT 1
#define PDC_WDT_DEF_TIMEOUT 64
-static int heartbeat;
+static int heartbeat = PDC_WDT_DEF_TIMEOUT;
module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
- "(default = " __MODULE_STRING(PDC_WDT_DEF_TIMEOUT) ")");
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds "
+ "(default=" __MODULE_STRING(PDC_WDT_DEF_TIMEOUT) ")");
static bool nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, bool, 0);
@@ -191,6 +191,7 @@ static int pdc_wdt_probe(struct platform_device *pdev)
pdc_wdt->wdt_dev.ops = &pdc_wdt_ops;
pdc_wdt->wdt_dev.max_timeout = 1 << PDC_WDT_CONFIG_DELAY_MASK;
pdc_wdt->wdt_dev.parent = &pdev->dev;
+ watchdog_set_drvdata(&pdc_wdt->wdt_dev, pdc_wdt);
ret = watchdog_init_timeout(&pdc_wdt->wdt_dev, heartbeat, &pdev->dev);
if (ret < 0) {
@@ -232,7 +233,6 @@ static int pdc_wdt_probe(struct platform_device *pdev)
watchdog_set_nowayout(&pdc_wdt->wdt_dev, nowayout);
platform_set_drvdata(pdev, pdc_wdt);
- watchdog_set_drvdata(&pdc_wdt->wdt_dev, pdc_wdt);
ret = watchdog_register_device(&pdc_wdt->wdt_dev);
if (ret)
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index a87f6df..938b987 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -133,7 +133,7 @@ static int mtk_wdt_start(struct watchdog_device *wdt_dev)
u32 reg;
struct mtk_wdt_dev *mtk_wdt = watchdog_get_drvdata(wdt_dev);
void __iomem *wdt_base = mtk_wdt->wdt_base;
- u32 ret;
+ int ret;
ret = mtk_wdt_set_timeout(wdt_dev, wdt_dev->timeout);
if (ret < 0)
--
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