linux-kernel - [PATCH v2 5/5] gpio: xilinx: No need to disable IRQs in the handler

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Date:   Mon, 10 May 2021 22:46:33 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Srinivas Neeli <srinivas.neeli@...inx.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>,
        Michal Simek <michal.simek@...inx.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Yury Norov <yury.norov@...il.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Neeli Srinivas <sneeli@...inx.com>
Subject: [PATCH v2 5/5] gpio: xilinx: No need to disable IRQs in the handler

In IRQ handler interrupts are already disabled, hence no need
to repeat it. Even in the threaded case, it is not a problem
because IRQ framework keeps interrupt disabled there as well.
Remove disabling IRQ part in the handler.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Tested-by: Neeli Srinivas <sneeli@...inx.com>
---
 drivers/gpio/gpio-xilinx.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index d2b7458b1d69..109b32104867 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -509,14 +509,13 @@ static void xgpio_irqhandler(struct irq_desc *desc)
 	int irq_offset;
 	u32 status;
 	u32 bit;
-	unsigned long flags;
 
 	status = xgpio_readreg(chip->regs + XGPIO_IPISR_OFFSET);
 	xgpio_writereg(chip->regs + XGPIO_IPISR_OFFSET, status);
 
 	chained_irq_enter(irqchip, desc);
 
-	spin_lock_irqsave(&chip->gpio_lock, flags);
+	spin_lock(&chip->gpio_lock);
 
 	xgpio_read_ch_all(chip, XGPIO_DATA_OFFSET, all);
 
@@ -533,7 +532,7 @@ static void xgpio_irqhandler(struct irq_desc *desc)
 	bitmap_copy(chip->last_irq_read, all, 64);
 	bitmap_or(all, rising, falling, 64);
 
-	spin_unlock_irqrestore(&chip->gpio_lock, flags);
+	spin_unlock(&chip->gpio_lock);
 
 	dev_dbg(gc->parent, "IRQ rising %*pb falling %*pb\n", 64, rising, 64, falling);
 
-- 
2.30.2