From: Robin Gong <yibin.gong@xxxxxxx> commit 892cb524ae8a27bf5e42f711318371acd9a9f74a upstream. Since IRQF_NO_SUSPEND used for imx mailbox driver, that means this irq can't be used for wakeup source so that can't wakeup from freeze mode. Add pm_system_wakeup() to wakeup from freeze mode. Fixes: b7b2796b9b31e("mailbox: imx: ONLY IPC MU needs IRQF_NO_SUSPEND flag") Reviewed-by: Jacky Bai <ping.bai@xxxxxxx> Reviewed-by: Peng Fan <peng.fan@xxxxxxx> Signed-off-by: Robin Gong <yibin.gong@xxxxxxx> Signed-off-by: Peng Fan <peng.fan@xxxxxxx> Signed-off-by: Jassi Brar <jaswinder.singh@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/mailbox/imx-mailbox.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/mailbox/imx-mailbox.c +++ b/drivers/mailbox/imx-mailbox.c @@ -13,6 +13,7 @@ #include <linux/module.h> #include <linux/of_device.h> #include <linux/pm_runtime.h> +#include <linux/suspend.h> #include <linux/slab.h> #define IMX_MU_xSR_GIPn(x) BIT(28 + (3 - (x))) @@ -66,6 +67,7 @@ struct imx_mu_priv { const struct imx_mu_dcfg *dcfg; struct clk *clk; int irq; + bool suspend; u32 xcr; @@ -277,6 +279,9 @@ static irqreturn_t imx_mu_isr(int irq, v return IRQ_NONE; } + if (priv->suspend) + pm_system_wakeup(); + return IRQ_HANDLED; } @@ -326,6 +331,8 @@ static int imx_mu_startup(struct mbox_ch break; } + priv->suspend = true; + return 0; } @@ -543,6 +550,8 @@ static int imx_mu_probe(struct platform_ clk_disable_unprepare(priv->clk); + priv->suspend = false; + return 0; disable_runtime_pm: Patches currently in stable-queue which might be from yibin.gong@xxxxxxx are queue-5.10/mailbox-imx-fix-wakeup-failure-from-freeze-mode.patch