linux-kernel - [PATCH v2 02/13] PCI/ASPM: Improve pci_set_default_link

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Message-Id: <20230918131103.24119-3-ilpo.jarvinen@linux.intel.com>
Date:   Mon, 18 Sep 2023 16:10:52 +0300
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     linux-pci@...r.kernel.org, Bjorn Helgaas <helgaas@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Lukas Wunner <lukas@...ner.de>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        linux-kernel@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     ath10k@...ts.infradead.org, ath11k@...ts.infradead.org,
        ath12k@...ts.infradead.org, intel-wired-lan@...ts.osuosl.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-bluetooth@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-rdma@...r.kernel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH v2 02/13] PCI/ASPM: Improve pci_set_default_link_state() kerneldoc

Improve pci_set_default_link_state() documentation:

- Note the link state may get changed if the default policy is in use
- Better follow kerneldoc formatting guidelines (separate description
  block and return entries)

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
 drivers/pci/pcie/aspm.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index fc909e20365f..860bc94974ec 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -1102,14 +1102,18 @@ int pci_disable_link_state(struct pci_dev *pdev, int state)
 EXPORT_SYMBOL(pci_disable_link_state);
 
 /**
- * pci_set_default_link_state - Clear and set the default device link state so
- * that the link may be allowed to enter the specified 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. Also note that this does not enable states
- * disabled by pci_disable_link_state(). Return 0 or a negative errno.
- *
+ * pci_set_default_link_state - Set the default device link state
  * @pdev: PCI device
  * @state: Mask of ASPM link states to enable
+ *
+ * Set the default device link state so that the link may be allowed to
+ * enter the specified states. If the default policy is in use, the link
+ * state may also be updated to reflect the new default link state. Note
+ * that if the BIOS didn't grant ASPM control to the OS, this does nothing
+ * because we can't touch the LNKCTL register. Also note that this does not
+ * enable states disabled by pci_disable_link_state().
+ *
+ * Return: 0 or a negative errno.
  */
 int pci_set_default_link_state(struct pci_dev *pdev, int state)
 {
-- 
2.30.2