diff mbox series

[v4,05/11] PCI/ASPM: Return enabled ASPM states as part of pcie_aspm_enabled()

Message ID 20250609-mhi_bw_up-v4-5-3faa8fe92b05@qti.qualcomm.com
State New
Headers show
Series [v4,01/11] PCI: Update current bus speed as part of pci_pwrctrl_notify() | expand

Commit Message

Krishna Chaitanya Chundru June 9, 2025, 10:51 a.m. UTC 
PCIe ASPM states can be also controlled by userspace using exposed sysfs
entries, if drivers wants to disable and enable ASPM at runtime they
need to know enabled states for correctly enabling them back.

So return the enabled aspm states as part of pcie_aspm_enabled().

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
---
 drivers/pci/pcie/aspm.c | 4 +++-
 include/linux/pci.h     | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 29fcb0689a918f9cb123691e1680de5a1af2c115..94324fc0d3e650cd3ca2c0bb8c1895ca7e647b9d 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -1555,8 +1555,10 @@  module_param_call(policy, pcie_aspm_set_policy, pcie_aspm_get_policy,
  * is deallocated only when the last child of the bridge (i.e., @pdev or a
  * sibling) is removed, and the caller should be holding a reference to
  * @pdev, so this should be safe.
+ *
+ * Return: Enabled ASPM states
  */
-bool pcie_aspm_enabled(struct pci_dev *pdev)
+int pcie_aspm_enabled(struct pci_dev *pdev)
 {
 	struct pcie_link_state *link = pcie_aspm_get_link(pdev);
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 1740bab514b0a9a61c027463a1fb154843312a22..cb703443290a013c8372333fc8d547d190d9f3b4 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1848,7 +1848,7 @@  int pci_enable_link_state(struct pci_dev *pdev, int state);
 int pci_enable_link_state_locked(struct pci_dev *pdev, int state);
 void pcie_no_aspm(void);
 bool pcie_aspm_support_enabled(void);
-bool pcie_aspm_enabled(struct pci_dev *pdev);
+int pcie_aspm_enabled(struct pci_dev *pdev);
 #else
 static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
 { return 0; }
@@ -1860,7 +1860,7 @@  static inline int pci_enable_link_state_locked(struct pci_dev *pdev, int state)
 { return 0; }
 static inline void pcie_no_aspm(void) { }
 static inline bool pcie_aspm_support_enabled(void) { return false; }
-static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
+static inline int pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
 #endif
 
 #ifdef CONFIG_HOTPLUG_PCI