From: Colin King <colin.king@canonical.com>
To: Linus Walleij <linus.walleij@linaro.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Hongzhou Yang <hongzhou.yang@mediatek.com>,
Yingjoe Chen <yingjoe.chen@mediatek.com>,
Maoguang Meng <maoguang.meng@mediatek.com>,
linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] pinctrl: mediatek: mtk-common: initialize unmask
Date: Mon, 20 Apr 2015 06:15:16 -0500 [thread overview]
Message-ID: <1429528516-9245-1-git-send-email-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
cppcheck detected an unitialized variable:
[drivers/pinctrl/mediatek/pinctrl-mtk-common.c:897]:
(error) Uninitialized variable: unmask
unmask should be initialized to zero to ensure unmasking
only occurs if a previous mask occurred. The current situation
is that the unmask variable could contain any random garbage
causing random unexpected unmasking.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
index 493294c..3173125 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
@@ -881,7 +881,8 @@ static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
if (!mtk_eint_get_mask(pctl, eint_num)) {
mtk_eint_mask(d);
unmask = 1;
- }
+ } else
+ unmask = 0;
clr_bit = 0xff << eint_offset;
writel(clr_bit, pctl->eint_reg_base + clr_offset);
--
2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: colin.king@canonical.com (Colin King)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] pinctrl: mediatek: mtk-common: initialize unmask
Date: Mon, 20 Apr 2015 06:15:16 -0500 [thread overview]
Message-ID: <1429528516-9245-1-git-send-email-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
cppcheck detected an unitialized variable:
[drivers/pinctrl/mediatek/pinctrl-mtk-common.c:897]:
(error) Uninitialized variable: unmask
unmask should be initialized to zero to ensure unmasking
only occurs if a previous mask occurred. The current situation
is that the unmask variable could contain any random garbage
causing random unexpected unmasking.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
index 493294c..3173125 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
@@ -881,7 +881,8 @@ static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
if (!mtk_eint_get_mask(pctl, eint_num)) {
mtk_eint_mask(d);
unmask = 1;
- }
+ } else
+ unmask = 0;
clr_bit = 0xff << eint_offset;
writel(clr_bit, pctl->eint_reg_base + clr_offset);
--
2.1.4
next reply other threads:[~2015-04-20 11:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-20 11:15 Colin King [this message]
2015-04-20 11:15 ` [PATCH] pinctrl: mediatek: mtk-common: initialize unmask Colin King
2015-04-20 12:32 ` Sergei Shtylyov
2015-04-20 12:32 ` Sergei Shtylyov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1429528516-9245-1-git-send-email-colin.king@canonical.com \
--to=colin.king@canonical.com \
--cc=hongzhou.yang@mediatek.com \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=maoguang.meng@mediatek.com \
--cc=matthias.bgg@gmail.com \
--cc=yingjoe.chen@mediatek.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.