[PATCH 4.4 23/23] pinctrl: samsung: Remove bogus irq_[un]mask from resource management

From: Greg Kroah-Hartman
Date: Mon Aug 14 2017 - 21:19:22 EST


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

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

From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

commit 3fa53ec2ed885b0aec3f0472e3b4a8a6f1cd748c upstream.

The irq chip callbacks irq_request/release_resources() have absolutely no
business with masking and unmasking the irq.

The core code unmasks the interrupt after complete setup and masks it
before invoking irq_release_resources().

The unmask is actually harmful as it happens before the interrupt is
completely initialized in __setup_irq().

Remove it.

Fixes: f6a8249f9e55 ("pinctrl: exynos: Lock GPIOs as interrupts when used as EINTs")
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Kukjin Kim <kgene@xxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-samsung-soc@xxxxxxxxxxxxxxx
Cc: linux-gpio@xxxxxxxxxxxxxxx
Acked-by: Tomasz Figa <tomasz.figa@xxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/pinctrl/samsung/pinctrl-exynos.c | 4 ----
1 file changed, 4 deletions(-)

--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -194,8 +194,6 @@ static int exynos_irq_request_resources(

spin_unlock_irqrestore(&bank->slock, flags);

- exynos_irq_unmask(irqd);
-
return 0;
}

@@ -216,8 +214,6 @@ static void exynos_irq_release_resources
shift = irqd->hwirq * bank_type->fld_width[PINCFG_TYPE_FUNC];
mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;

- exynos_irq_mask(irqd);
-
spin_lock_irqsave(&bank->slock, flags);

con = readl(d->virt_base + reg_con);