diff options
Diffstat (limited to 'freebsd/sys/dev/pci/pci.c')
| -rw-r--r-- | freebsd/sys/dev/pci/pci.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/freebsd/sys/dev/pci/pci.c b/freebsd/sys/dev/pci/pci.c index 512e8636..09d1ee42 100644 --- a/freebsd/sys/dev/pci/pci.c +++ b/freebsd/sys/dev/pci/pci.c @@ -4467,6 +4467,7 @@ int pci_suspend_child(device_t dev, device_t child) { struct pci_devinfo *dinfo; + struct resource_list_entry *rle; int error; dinfo = device_get_ivars(child); @@ -4483,8 +4484,20 @@ pci_suspend_child(device_t dev, device_t child) if (error) return (error); - if (pci_do_power_suspend) + if (pci_do_power_suspend) { + /* + * Make sure this device's interrupt handler is not invoked + * in the case the device uses a shared interrupt that can + * be raised by some other device. + * This is applicable only to regular (legacy) PCI interrupts + * as MSI/MSI-X interrupts are never shared. + */ + rle = resource_list_find(&dinfo->resources, + SYS_RES_IRQ, 0); + if (rle != NULL && rle->res != NULL) + (void)bus_suspend_intr(child, rle->res); pci_set_power_child(dev, child, PCI_POWERSTATE_D3); + } return (0); } @@ -4493,6 +4506,7 @@ int pci_resume_child(device_t dev, device_t child) { struct pci_devinfo *dinfo; + struct resource_list_entry *rle; if (pci_do_power_resume) pci_set_power_child(dev, child, PCI_POWERSTATE_D0); @@ -4504,6 +4518,16 @@ pci_resume_child(device_t dev, device_t child) bus_generic_resume_child(dev, child); + /* + * Allow interrupts only after fully resuming the driver and hardware. + */ + if (pci_do_power_suspend) { + /* See pci_suspend_child for details. */ + rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0); + if (rle != NULL && rle->res != NULL) + (void)bus_resume_intr(child, rle->res); + } + return (0); } |