From 2b97789fa289d531e767d994a77e34ec58f328c4 Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Sat, 19 Apr 2014 08:51:44 +0530 Subject: [PATCH] phy: core: make NULL a valid phy reference if !CONFIG_GENERIC_PHY This fixes a regression on Keystone 2 platforms caused by patch 57303488cd37da58263e842de134dc65f7c626d5 "usb: dwc3: adapt dwc3 core to use Generic PHY Framework" which adds optional support of generic phy in DWC3 core. On Keystone 2 platforms the USB is not working now because CONFIG_GENERIC_PHY isn't set and, as result, Generic PHY APIs stubs return -ENOSYS always. The log shows: dwc3 2690000.dwc3: failed to initialize core dwc3: probe of 2690000.dwc3 failed with error -38 Hence, fix it by making NULL a valid phy reference in Generic PHY APIs stubs in the same way as it was done by the patch 04c2facad8fee66c981a51852806d8923336f362 "drivers: phy: Make NULL a valid phy reference". Acked-by: Felipe Balbi Acked-by: Santosh Shilimkar Signed-off-by: Grygorii Strashko Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Greg Kroah-Hartman --- include/linux/phy/phy.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index e2f5ca96cddc..2760744cb2a7 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -174,21 +174,29 @@ void devm_of_phy_provider_unregister(struct device *dev, #else static inline int phy_pm_runtime_get(struct phy *phy) { + if (!phy) + return 0; return -ENOSYS; } static inline int phy_pm_runtime_get_sync(struct phy *phy) { + if (!phy) + return 0; return -ENOSYS; } static inline int phy_pm_runtime_put(struct phy *phy) { + if (!phy) + return 0; return -ENOSYS; } static inline int phy_pm_runtime_put_sync(struct phy *phy) { + if (!phy) + return 0; return -ENOSYS; } @@ -204,21 +212,29 @@ static inline void phy_pm_runtime_forbid(struct phy *phy) static inline int phy_init(struct phy *phy) { + if (!phy) + return 0; return -ENOSYS; } static inline int phy_exit(struct phy *phy) { + if (!phy) + return 0; return -ENOSYS; } static inline int phy_power_on(struct phy *phy) { + if (!phy) + return 0; return -ENOSYS; } static inline int phy_power_off(struct phy *phy) { + if (!phy) + return 0; return -ENOSYS; } -- GitLab