From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: Tomasz Figa <tomasz.figa@gmail.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
Sylwester Nawrocki <s.nawrocki@samsung.com>,
Linus Walleij <linus.walleij@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-gpio@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: [PATCH] pinctrl: samsung: use 'int' for register masks in Exynos
Date: Thu, 8 Apr 2021 21:50:29 +0200 [thread overview]
Message-ID: <20210408195029.69974-1-krzysztof.kozlowski@canonical.com> (raw)
The Special Function Registers on all Exynos SoC, including ARM64, are
32-bit wide, so entire driver uses matching functions like readl() or
writel(). On 64-bit ARM using unsigned long for register masks:
1. makes little sense as immediately after bitwise operation it will be
cast to 32-bit value when calling writel(),
2. is actually error-prone because it might promote other operands to
64-bit.
Addresses-Coverity: Unintentional integer overflow
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
Not tested on ARM64.
Dear Linus,
Please apply it directly, I don't have any patches for Samsung pinctrl
in my tree.
---
drivers/pinctrl/samsung/pinctrl-exynos.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 0cd7f33cdf25..2b99f4130e1e 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -55,7 +55,7 @@ static void exynos_irq_mask(struct irq_data *irqd)
struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
unsigned long reg_mask = our_chip->eint_mask + bank->eint_offset;
- unsigned long mask;
+ unsigned int mask;
unsigned long flags;
raw_spin_lock_irqsave(&bank->slock, flags);
@@ -83,7 +83,7 @@ static void exynos_irq_unmask(struct irq_data *irqd)
struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
unsigned long reg_mask = our_chip->eint_mask + bank->eint_offset;
- unsigned long mask;
+ unsigned int mask;
unsigned long flags;
/*
@@ -483,7 +483,7 @@ static void exynos_irq_eint0_15(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
-static inline void exynos_irq_demux_eint(unsigned long pend,
+static inline void exynos_irq_demux_eint(unsigned int pend,
struct irq_domain *domain)
{
unsigned int irq;
@@ -500,8 +500,8 @@ static void exynos_irq_demux_eint16_31(struct irq_desc *desc)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
struct exynos_muxed_weint_data *eintd = irq_desc_get_handler_data(desc);
- unsigned long pend;
- unsigned long mask;
+ unsigned int pend;
+ unsigned int mask;
int i;
chained_irq_enter(chip, desc);
--
2.25.1
next reply other threads:[~2021-04-08 19:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20210408195041eucas1p1b63616039af4e1156aa4cfd8101b1362@eucas1p1.samsung.com>
2021-04-08 19:50 ` Krzysztof Kozlowski [this message]
2021-04-09 11:53 ` [PATCH] pinctrl: samsung: use 'int' for register masks in Exynos Sylwester Nawrocki
2021-04-10 0:07 ` Linus Walleij
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