linux-kernel - [PATCH v3 06/10] PCI/PTM: Add pci_enable

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Message-Id: <20220906222351.64760-7-helgaas@kernel.org>
Date:   Tue,  6 Sep 2022 17:23:47 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Rajvi Jingar <rajvi.jingar@...ux.intel.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>
Cc:     Koba Ko <koba.ko@...onical.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "David E . Box" <david.e.box@...ux.intel.com>,
        Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        linux-pci@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH v3 06/10] PCI/PTM: Add pci_enable_ptm() wrapper

From: Bjorn Helgaas <bhelgaas@...gle.com>

Implement pci_enable_ptm() as a wrapper around an internal
__pci_enable_ptm() that we can use during resume to enable PTM without
emitting log messages.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/pci/pcie/ptm.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/ptm.c b/drivers/pci/pcie/ptm.c
index 762299984469..4a9f045126ca 100644
--- a/drivers/pci/pcie/ptm.c
+++ b/drivers/pci/pcie/ptm.c
@@ -152,7 +152,7 @@ void pci_ptm_init(struct pci_dev *dev)
 		pci_enable_ptm(dev, NULL);
 }
 
-int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
+static int __pci_enable_ptm(struct pci_dev *dev)
 {
 	int ptm = dev->ptm_cap;
 	struct pci_dev *ups;
@@ -177,6 +177,17 @@ int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
 		ctrl |= PCI_PTM_CTRL_ROOT;
 
 	pci_write_config_dword(dev, ptm + PCI_PTM_CTRL, ctrl);
+	return 0;
+}
+
+int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
+{
+	int rc;
+
+	rc = __pci_enable_ptm(dev);
+	if (rc)
+		return rc;
+
 	dev->ptm_enabled = 1;
 
 	pci_ptm_info(dev);
-- 
2.25.1