The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From b8c824a869f220c6b46df724f85794349bafbf23 Mon Sep 17 00:00:00 2001 From: Basavaraj Natikar Basavaraj.Natikar@amd.com Date: Mon, 13 Jun 2022 12:11:26 +0530 Subject: [PATCH] pinctrl: amd: Don't save/restore interrupt status and wake status bits
Saving/restoring interrupt and wake status bits across suspend can cause the suspend to fail if an IRQ is serviced across the suspend cycle.
Signed-off-by: Mario Limonciello mario.limonciello@amd.com Signed-off-by: Basavaraj Natikar Basavaraj.Natikar@amd.com Fixes: 79d2c8bede2c ("pinctrl/amd: save pin registers over suspend/resume") Link: https://lore.kernel.org/r/20220613064127.220416-3-Basavaraj.Natikar@amd.com Signed-off-by: Linus Walleij linus.walleij@linaro.org
diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c index e497df89a4a7..9ec97c6db5e9 100644 --- a/drivers/pinctrl/pinctrl-amd.c +++ b/drivers/pinctrl/pinctrl-amd.c @@ -918,6 +918,7 @@ static int amd_gpio_suspend(struct device *dev) { struct amd_gpio *gpio_dev = dev_get_drvdata(dev); struct pinctrl_desc *desc = gpio_dev->pctrl->desc; + unsigned long flags; int i;
for (i = 0; i < desc->npins; i++) { @@ -926,7 +927,9 @@ static int amd_gpio_suspend(struct device *dev) if (!amd_gpio_should_save(gpio_dev, pin)) continue;
- gpio_dev->saved_regs[i] = readl(gpio_dev->base + pin*4); + raw_spin_lock_irqsave(&gpio_dev->lock, flags); + gpio_dev->saved_regs[i] = readl(gpio_dev->base + pin * 4) & ~PIN_IRQ_PENDING; + raw_spin_unlock_irqrestore(&gpio_dev->lock, flags); }
return 0; @@ -936,6 +939,7 @@ static int amd_gpio_resume(struct device *dev) { struct amd_gpio *gpio_dev = dev_get_drvdata(dev); struct pinctrl_desc *desc = gpio_dev->pctrl->desc; + unsigned long flags; int i;
for (i = 0; i < desc->npins; i++) { @@ -944,7 +948,10 @@ static int amd_gpio_resume(struct device *dev) if (!amd_gpio_should_save(gpio_dev, pin)) continue;
- writel(gpio_dev->saved_regs[i], gpio_dev->base + pin*4); + raw_spin_lock_irqsave(&gpio_dev->lock, flags); + gpio_dev->saved_regs[i] |= readl(gpio_dev->base + pin * 4) & PIN_IRQ_PENDING; + writel(gpio_dev->saved_regs[i], gpio_dev->base + pin * 4); + raw_spin_unlock_irqrestore(&gpio_dev->lock, flags); }
return 0;