diff options
| author | Lukas Wunner <lukas@wunner.de> | 2018-07-19 17:27:57 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-07-31 11:09:36 -0500 |
| commit | 4417aa45c185376ece278430e33b6a1891a1dc36 (patch) | |
| tree | 0e498444068e5ba5e4d8a280d972faabd2ff1e22 /drivers/pci/hotplug/pciehp_hpc.c | |
| parent | 8350307454240abeebe52ff5a73810d9ba93dd60 (diff) | |
PCI: pciehp: Resume parent to D0 on config space access
Ensure accessibility of a hotplug port's config space when accessed via
sysfs by resuming its parent to D0.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Diffstat (limited to 'drivers/pci/hotplug/pciehp_hpc.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 6e9b4330ad82..6f7de0819c88 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -322,7 +322,9 @@ int pciehp_get_raw_indicator_status(struct hotplug_slot *hotplug_slot, struct pci_dev *pdev = ctrl_dev(slot->ctrl); u16 slot_ctrl; + pci_config_pm_runtime_get(pdev); pcie_capability_read_word(pdev, PCI_EXP_SLTCTL, &slot_ctrl); + pci_config_pm_runtime_put(pdev); *status = (slot_ctrl & (PCI_EXP_SLTCTL_AIC | PCI_EXP_SLTCTL_PIC)) >> 6; return 0; } @@ -333,7 +335,9 @@ void pciehp_get_attention_status(struct slot *slot, u8 *status) struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_ctrl; + pci_config_pm_runtime_get(pdev); pcie_capability_read_word(pdev, PCI_EXP_SLTCTL, &slot_ctrl); + pci_config_pm_runtime_put(pdev); ctrl_dbg(ctrl, "%s: SLOTCTRL %x, value read %x\n", __func__, pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_ctrl); @@ -408,9 +412,12 @@ int pciehp_set_raw_indicator_status(struct hotplug_slot *hotplug_slot, { struct slot *slot = hotplug_slot->private; struct controller *ctrl = slot->ctrl; + struct pci_dev *pdev = ctrl_dev(ctrl); + pci_config_pm_runtime_get(pdev); pcie_write_cmd_nowait(ctrl, status << 6, PCI_EXP_SLTCTL_AIC | PCI_EXP_SLTCTL_PIC); + pci_config_pm_runtime_put(pdev); return 0; } |