linux-kernel - [PATCH 7/8] PCI: Make pcie_link_speed variable public & export pci_set_target

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Message-Id: <20250217-mhi_bw_up-v1-7-9bad1e42bdb1@oss.qualcomm.com>
Date: Mon, 17 Feb 2025 12:04:14 +0530
From: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Johannes Berg <johannes@...solutions.net>,
        Jeff Johnson <jjohnson@...nel.org>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, mhi@...ts.linux.dev,
        linux-wireless@...r.kernel.org, ath11k@...ts.infradead.org,
        quic_jjohnson@...cinc.com, quic_pyarlaga@...cinc.com,
        quic_vbadigan@...cinc.com, quic_vpernami@...cinc.com,
        quic_mrana@...cinc.com,
        Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Subject: [PATCH 7/8] PCI: Make pcie_link_speed variable public & export
 pci_set_target_speed()

It can be used by the PCIe client drivers and reduce the code duplication.
And export pci_set_target_speed() so that other kernel drivers can use it.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
---
 drivers/pci/pci.h         | 1 -
 drivers/pci/pcie/bwctrl.c | 1 +
 include/linux/pci.h       | 1 +
 3 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 01e51db8d285..ada9a0433a99 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -82,7 +82,6 @@ struct pcie_tlp_log;
 #define PCIE_MSG_CODE_DEASSERT_INTC	0x26
 #define PCIE_MSG_CODE_DEASSERT_INTD	0x27
 
-extern const unsigned char pcie_link_speed[];
 extern bool pci_early_dump;
 
 bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
diff --git a/drivers/pci/pcie/bwctrl.c b/drivers/pci/pcie/bwctrl.c
index e3faa4d1f935..dc01c93bcc37 100644
--- a/drivers/pci/pcie/bwctrl.c
+++ b/drivers/pci/pcie/bwctrl.c
@@ -214,6 +214,7 @@ int pcie_set_target_speed(struct pci_dev *port, enum pci_bus_speed speed_req,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(pcie_set_target_speed);
 
 static void pcie_bwnotif_enable(struct pcie_device *srv)
 {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 58f1de626c37..8a3b3195122d 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -305,6 +305,7 @@ enum pci_bus_speed {
 
 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
+extern const unsigned char pcie_link_speed[];
 
 struct pci_vpd {
 	struct mutex	lock;

-- 
2.34.1