linux-kernel - [PATCH 3/6] PCI/ASPM: Improve the kernel-doc for pci_disable_link

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Message-Id: <20250716-ath-aspm-fix-v1-3-dd3e62c1b692@oss.qualcomm.com>
Date: Wed, 16 Jul 2025 18:26:22 +0530
From: Manivannan Sadhasivam via B4 Relay <devnull+manivannan.sadhasivam.oss.qualcomm.com@...nel.org>
To: Jeff Johnson <jjohnson@...nel.org>, 
 Manivannan Sadhasivam <mani@...nel.org>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, 
 Nirmal Patel <nirmal.patel@...ux.intel.com>, 
 Jonathan Derrick <jonathan.derrick@...ux.dev>
Cc: linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org, 
 ath12k@...ts.infradead.org, ath11k@...ts.infradead.org, 
 ath10k@...ts.infradead.org, Bjorn Helgaas <helgaas@...nel.org>, 
 ilpo.jarvinen@...ux.intel.com, linux-arm-msm@...r.kernel.org, 
 linux-pci@...r.kernel.org, 
 Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
Subject: [PATCH 3/6] PCI/ASPM: Improve the kernel-doc for
 pci_disable_link_state*() APIs

From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>

Add kernel-doc for pci_disable_link_state_locked() API and fix the
kernel-doc for pci_disable_link_state() API.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
---
 drivers/pci/pcie/aspm.c | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index c56553de953c158cf9e8bf54c6b358a9a81a2691..4d30e894198c40a168fc03626270b361d5124b67 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -1409,6 +1409,19 @@ static int __pci_disable_link_state(struct pci_dev *pdev, int state, bool locked
 	return 0;
 }
 
+/**
+ * pci_disable_link_state_locked - Disable device's link state
+ * @pdev: PCI device
+ * @state: ASPM link state to disable
+ *
+ * Disable device's link state, so the link will never enter specific states.
+ * Note that if the BIOS didn't grant ASPM control to the OS, this does nothing
+ * because we can't touch the LNKCTL register.
+ *
+ * Context: Caller holds pci_bus_sem read lock.
+ *
+ * Return: 0 on success, a negative errno otherwise.
+ */
 int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
 {
 	lockdep_assert_held_read(&pci_bus_sem);
@@ -1418,13 +1431,15 @@ int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
 EXPORT_SYMBOL(pci_disable_link_state_locked);
 
 /**
- * pci_disable_link_state - Disable device's link state, so the link will
- * never enter specific states.  Note that if the BIOS didn't grant ASPM
- * control to the OS, this does nothing because we can't touch the LNKCTL
- * register. Returns 0 or a negative errno.
- *
+ * pci_disable_link_state - Disable device's link state
  * @pdev: PCI device
  * @state: ASPM link state to disable
+ *
+ * Disable device's link state, so the link will never enter specific states.
+ * Note that if the BIOS didn't grant ASPM control to the OS, this does nothing
+ * because we can't touch the LNKCTL register.
+ *
+ * Return: 0 on success, a negative errno otherwise.
  */
 int pci_disable_link_state(struct pci_dev *pdev, int state)
 {

-- 
2.45.2