Date: Wed, 15 Jun 2011 18:46:56 GMT From: John Baldwin <jhb@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 194802 for review Message-ID: <201106151846.p5FIkuAl095610@skunkworks.freebsd.org>
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http://p4web.freebsd.org/@@194802?ac=10 Change 194802 by jhb@jhb_jhbbsd on 2011/06/15 18:46:29 Don't create ACPI device_t objects for ACPI devices that don't have a _HID or _CID. Affected files ... .. //depot/projects/pci/sys/dev/acpica/acpi.c#4 edit .. //depot/projects/pci/sys/dev/acpica/acpi_pci.c#3 edit Differences ... ==== //depot/projects/pci/sys/dev/acpica/acpi.c#4 (text+ko) ==== @@ -149,6 +149,7 @@ static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); static void acpi_shutdown_final(void *arg, int howto); static void acpi_enable_fixed_events(struct acpi_softc *sc); +static BOOLEAN acpi_has_hid(ACPI_HANDLE handle); static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); static int acpi_wake_prep_walk(int sstate); @@ -1841,6 +1842,13 @@ break; if (acpi_parse_prw(handle, &prw) == 0) AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); + + /* + * Ignore devices that do not have a _HID or _CID. They should + * be discovered by other buses (e.g. the PCI bus driver). + */ + if (!acpi_has_hid(handle)) + break; /* FALLTHROUGH */ case ACPI_TYPE_PROCESSOR: case ACPI_TYPE_THERMAL: @@ -2029,6 +2037,30 @@ } /* + * Returns true if a device has at least one valid device ID. + */ +static BOOLEAN +acpi_has_hid(ACPI_HANDLE h) +{ + ACPI_DEVICE_INFO *devinfo; + BOOLEAN ret; + + if (h == NULL || + ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) + return (FALSE); + + ret = FALSE; + if ((devinfo->Valid & ACPI_VALID_HID) != 0) + ret = TRUE; + else if ((devinfo->Valid & ACPI_VALID_CID) != 0) + if (devinfo->CompatibleIdList.Count > 0) + ret = TRUE; + + AcpiOsFree(devinfo); + return (ret); +} + +/* * Match a HID string against a handle */ BOOLEAN ==== //depot/projects/pci/sys/dev/acpica/acpi_pci.c#3 (text+ko) ==== @@ -210,38 +210,24 @@ device_t child; /* - * Lookup and remove the unused device that acpi0 creates when it walks - * the namespace creating devices. + * Occasionally a PCI device may show up as an ACPI device + * with a _HID. (For example, the TabletPC TC1000 has a + * second PCI-ISA bridge that has a _HID for an + * acpi_sysresource device.) In that case, leave ACPI-CA's + * device data pointing at the ACPI-enumerated device. */ child = acpi_get_device(handle); if (child != NULL) { - if (device_is_alive(child)) { - /* - * The TabletPC TC1000 has a second PCI-ISA bridge - * that has a _HID for an acpi_sysresource device. - * In that case, leave ACPI-CA's device data pointing - * at the ACPI-enumerated device. - */ - device_printf(child, - "Conflicts with PCI device %d:%d:%d\n", - pci_get_bus(pci_child), pci_get_slot(pci_child), - pci_get_function(pci_child)); - return; - } KASSERT(device_get_parent(child) == devclass_get_device(devclass_find("acpi"), 0), ("%s: child (%s)'s parent is not acpi0", __func__, acpi_name(handle))); - device_delete_child(device_get_parent(child), child); + return; } /* * Update ACPI-CA to use the PCI enumerated device_t for this handle. */ - status = AcpiDetachData(handle, acpi_fake_objhandler); - if (ACPI_FAILURE(status)) - printf("WARNING: Unable to detach object data from %s - %s\n", - acpi_name(handle), AcpiFormatException(status)); status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child); if (ACPI_FAILURE(status)) printf("WARNING: Unable to attach object data to %s - %s\n",
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