pinctrl: qcom: Don't clear status bit on irq_unmask

[ Upstream commit a6566710 ]

Clearing the status bit on irq_unmask will discard any pending interrupt
that did arrive after the irq_ack, i.e. while the IRQ handler function
was executing.

Fixes: f365be09 ("pinctrl: Add Qualcomm TLMM driver")
Cc: stable@vger.kernel.org
Cc: Stephen Boyd <sboyd@codeaurora.org>
Reported-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

drivers/pinctrl/qcom/pinctrl-msm.c

@@ -608,10 +608,6 @@ static void msm_gpio_irq_unmask(struct irq_data *d)
 
 	spin_lock_irqsave(&pctrl->lock, flags);
 
-	val = readl(pctrl->regs + g->intr_status_reg);
-	val &= ~BIT(g->intr_status_bit);
-	writel(val, pctrl->regs + g->intr_status_reg);
-
 	val = readl(pctrl->regs + g->intr_cfg_reg);
 	val |= BIT(g->intr_enable_bit);
 	writel(val, pctrl->regs + g->intr_cfg_reg);