diff options
Diffstat (limited to 'sys/dev/pci/pci.c')
| -rw-r--r-- | sys/dev/pci/pci.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c index ad13e7f9a3a4..4c7ca27d8e64 100644 --- a/sys/dev/pci/pci.c +++ b/sys/dev/pci/pci.c @@ -2936,6 +2936,22 @@ pci_get_powerstate_method(device_t dev, device_t child) return (result); } +/* Clear any active PME# and disable PME# generation. */ +void +pci_clear_pme(device_t dev) +{ + struct pci_devinfo *dinfo = device_get_ivars(dev); + pcicfgregs *cfg = &dinfo->cfg; + uint16_t status; + + if (cfg->pp.pp_cap != 0) { + status = pci_read_config(dev, dinfo->cfg.pp.pp_status, 2); + status &= ~PCIM_PSTAT_PMEENABLE; + status |= PCIM_PSTAT_PME; + pci_write_config(dev, dinfo->cfg.pp.pp_status, status, 2); + } +} + /* * Some convenience functions for PCI device drivers. */ @@ -4472,6 +4488,7 @@ pci_add_child(device_t bus, struct pci_devinfo *dinfo) resource_list_init(&dinfo->resources); pci_cfg_save(dev, dinfo, 0); pci_cfg_restore(dev, dinfo); + pci_clear_pme(dev); pci_print_verbose(dinfo); pci_add_resources(bus, dev, 0, 0); if (pci_enable_mps_tune) @@ -4662,6 +4679,7 @@ pci_resume_child(device_t dev, device_t child) dinfo = device_get_ivars(child); pci_cfg_restore(child, dinfo); + pci_clear_pme(child); if (!device_is_attached(child)) pci_cfg_save(child, dinfo, 1); |