From: Kornel Dulęba Date: Thu, 26 Jan 2023 13:25:35 +0000 (+0000) Subject: net: wwan: t7xx: Fix Runtime PM initialization X-Git-Tag: baikal/aarch64/sdk6.1~162 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=181040bd6d69dd867244a41b4f54c52a9756ff61;p=kernel.git net: wwan: t7xx: Fix Runtime PM initialization [ Upstream commit e3d6d152a1cbdee25f2e3962009a2751b54e2297 ] For PCI devices the Runtime PM refcount is incremented twice: 1. During device enumeration with a call to pm_runtime_forbid. 2. Just before a driver probe logic is called. Because of that in order to enable Runtime PM on a given device we have to call both pm_runtime_allow and pm_runtime_put_noidle, once it's ready to be runtime suspended. The former was missing causing the pm refcount to never reach 0. Fixes: 04c72a7cbc38 ("net: wwan: t7xx: Runtime PM") Signed-off-by: Kornel Dulęba Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- diff --git a/drivers/net/wwan/t7xx/t7xx_pci.c b/drivers/net/wwan/t7xx/t7xx_pci.c index 871f2a27a398a..226fc1703e90f 100644 --- a/drivers/net/wwan/t7xx/t7xx_pci.c +++ b/drivers/net/wwan/t7xx/t7xx_pci.c @@ -121,6 +121,8 @@ void t7xx_pci_pm_init_late(struct t7xx_pci_dev *t7xx_dev) iowrite32(T7XX_L1_BIT(0), IREG_BASE(t7xx_dev) + ENABLE_ASPM_LOWPWR); atomic_set(&t7xx_dev->md_pm_state, MTK_PM_RESUMED); + pm_runtime_mark_last_busy(&t7xx_dev->pdev->dev); + pm_runtime_allow(&t7xx_dev->pdev->dev); pm_runtime_put_noidle(&t7xx_dev->pdev->dev); }