linux-kernel - [RFC PATCH v2 1/3] PCI/ASPM: Merge pcie_set_clkpm_nocheck() into pcie_set

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Date:   Sat,  6 Nov 2021 18:55:44 +0100
From:   "Saheed O. Bolarinwa" <refactormyself@...il.com>
To:     helgaas@...nel.org
Cc:     "Saheed O. Bolarinwa" <refactormyself@...il.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 1/3] PCI/ASPM: Merge pcie_set_clkpm_nocheck() into pcie_set_clkpm()

pcie_set_clkpm_nocheck() is only called from pcie_set_clkpm().

Merge the two functions

Signed-off-by: Saheed O. Bolarinwa <refactormyself@...il.com>
---
 drivers/pci/pcie/aspm.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 013a47f587ce..e5202cc16ef0 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -139,21 +139,12 @@ static int policy_to_clkpm_state(struct pcie_link_state *link)
 	return 0;
 }
 
-static void pcie_set_clkpm_nocheck(struct pcie_link_state *link, int enable)
+static void pcie_set_clkpm(struct pcie_link_state *link, int enable)
 {
+	u32 val;
 	struct pci_dev *child;
 	struct pci_bus *linkbus = link->pdev->subordinate;
-	u32 val = enable ? PCI_EXP_LNKCTL_CLKREQ_EN : 0;
-
-	list_for_each_entry(child, &linkbus->devices, bus_list)
-		pcie_capability_clear_and_set_word(child, PCI_EXP_LNKCTL,
-						   PCI_EXP_LNKCTL_CLKREQ_EN,
-						   val);
-	link->clkpm_enabled = !!enable;
-}
 
-static void pcie_set_clkpm(struct pcie_link_state *link, int enable)
-{
 	/*
 	 * Don't enable Clock PM if the link is not Clock PM capable
 	 * or Clock PM is disabled
@@ -163,7 +154,14 @@ static void pcie_set_clkpm(struct pcie_link_state *link, int enable)
 	/* Need nothing if the specified equals to current state */
 	if (link->clkpm_enabled == enable)
 		return;
-	pcie_set_clkpm_nocheck(link, enable);
+
+	val = enable ? PCI_EXP_LNKCTL_CLKREQ_EN : 0;
+	list_for_each_entry(child, &linkbus->devices, bus_list)
+		pcie_capability_clear_and_set_word(child, PCI_EXP_LNKCTL,
+						   PCI_EXP_LNKCTL_CLKREQ_EN,
+						   val);
+
+	link->clkpm_enabled = !!enable;
 }
 
 static void pcie_clkpm_cap_init(struct pcie_link_state *link, int blacklist)
-- 
2.20.1