From: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Date: Mon, 26 Jul 2021 20:36:54 -0700
Subject: Revert "PCI: Make pci_enable_ptm() private"
Patch-mainline: v5.15-rc1
Git-commit: 1d71eb53e45187f58089d32b51e27784c791d90e
References: jsc#SLE-18377

Make pci_enable_ptm() accessible from the drivers.

Exposing this to the driver enables the driver to use the
'ptm_enabled' field of 'pci_dev' to check if PTM is enabled or not.

This reverts commit ac6c26da29c1 ("PCI: Make pci_enable_ptm() private").

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/pci/pci.h   |    3 ---
 include/linux/pci.h |    7 +++++++
 2 files changed, 7 insertions(+), 3 deletions(-)

--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -597,11 +597,8 @@ static inline void pcie_ecrc_get_policy(
 
 #ifdef CONFIG_PCIE_PTM
 void pci_ptm_init(struct pci_dev *dev);
-int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
 #else
 static inline void pci_ptm_init(struct pci_dev *dev) { }
-static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
-{ return -EINVAL; }
 #endif
 
 struct pci_dev_reset_methods {
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1620,6 +1620,13 @@ static inline bool pci_aer_available(voi
 
 bool pci_ats_disabled(void);
 
+#ifdef CONFIG_PCIE_PTM
+int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
+#else
+static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
+{ return -EINVAL; }
+#endif
+
 void pci_cfg_access_lock(struct pci_dev *dev);
 bool pci_cfg_access_trylock(struct pci_dev *dev);
 void pci_cfg_access_unlock(struct pci_dev *dev);