linux-kernel - [PATCH 4.19 078/101] gpio: pcie-idio-24: Fix IRQ Enable Register value

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Message-Id: <20201117122116.921376222@linuxfoundation.org>
Date:   Tue, 17 Nov 2020 14:05:45 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnaud de Turckheim <quarium@...il.com>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 4.19 078/101] gpio: pcie-idio-24: Fix IRQ Enable Register value

From: Arnaud de Turckheim <quarium@...il.com>

commit 23a7fdc06ebcc334fa667f0550676b035510b70b upstream.

This fixes the COS Enable Register value for enabling/disabling the
corresponding IRQs bank.

Fixes: 585562046628 ("gpio: Add GPIO support for the ACCES PCIe-IDIO-24 family")
Cc: stable@...r.kernel.org
Signed-off-by: Arnaud de Turckheim <quarium@...il.com>
Reviewed-by: William Breathitt Gray <vilhelm.gray@...il.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpio/gpio-pcie-idio-24.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/gpio/gpio-pcie-idio-24.c
+++ b/drivers/gpio/gpio-pcie-idio-24.c
@@ -360,13 +360,13 @@ static void idio_24_irq_mask(struct irq_
 	unsigned long flags;
 	const unsigned long bit_offset = irqd_to_hwirq(data) - 24;
 	unsigned char new_irq_mask;
-	const unsigned long bank_offset = bit_offset/8 * 8;
+	const unsigned long bank_offset = bit_offset / 8;
 	unsigned char cos_enable_state;
 
 	raw_spin_lock_irqsave(&idio24gpio->lock, flags);
 
 	idio24gpio->irq_mask &= ~BIT(bit_offset);
-	new_irq_mask = idio24gpio->irq_mask >> bank_offset;
+	new_irq_mask = idio24gpio->irq_mask >> bank_offset * 8;
 
 	if (!new_irq_mask) {
 		cos_enable_state = ioread8(&idio24gpio->reg->cos_enable);
@@ -389,12 +389,12 @@ static void idio_24_irq_unmask(struct ir
 	unsigned long flags;
 	unsigned char prev_irq_mask;
 	const unsigned long bit_offset = irqd_to_hwirq(data) - 24;
-	const unsigned long bank_offset = bit_offset/8 * 8;
+	const unsigned long bank_offset = bit_offset / 8;
 	unsigned char cos_enable_state;
 
 	raw_spin_lock_irqsave(&idio24gpio->lock, flags);
 
-	prev_irq_mask = idio24gpio->irq_mask >> bank_offset;
+	prev_irq_mask = idio24gpio->irq_mask >> bank_offset * 8;
 	idio24gpio->irq_mask |= BIT(bit_offset);
 
 	if (!prev_irq_mask) {