This is a note to let you know that I've just added the patch titled
pinctrl: samsung: Remove bogus irq_[un]mask from resource management
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-samsung-remove-bogus-irq_mask-from-resource-management.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3fa53ec2ed885b0aec3f0472e3b4a8a6f1cd748c Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Thu, 29 Jun 2017 23:33:35 +0200
Subject: pinctrl: samsung: Remove bogus irq_[un]mask from resource management
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);
Patches currently in stable-queue which might be from tglx@xxxxxxxxxxxxx are
queue-4.4/pinctrl-samsung-remove-bogus-irq_mask-from-resource-management.patch