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MPSAFE locking

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* Serialize access to acpi_pci_set_powerstate_method().
This commit is contained in:
Nate Lawson 2004-08-13 06:21:58 +00:00
parent 2014ed9841
commit f4e6d08d46
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=133619
1 changed files with 10 additions and 4 deletions
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14
sys/dev/acpica/acpi_pci.c
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@ -57,6 +57,8 @@ struct acpi_pci_devinfo {
int ap_flags;
};
ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
static int acpi_pci_attach(device_t dev);
static int acpi_pci_child_location_str_method(device_t cbdev,
device_t child, char *buf, size_t buflen);
@ -183,6 +185,7 @@ acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
ACPI_STATUS status;
int acpi_state, old_state, error;
error = 0;
switch (state) {
case PCI_POWERSTATE_D0:
acpi_state = ACPI_STATE_D0;
@ -209,11 +212,12 @@ acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
* it can enable any needed Power Resources before changing the PCI
* power state.
*/
ACPI_SERIAL_BEGIN(pci_powerstate);
old_state = pci_get_powerstate(child);
if (old_state < state) {
error = pci_set_powerstate_method(dev, child, state);
if (error)
return (error);
goto out;
}
h = acpi_get_handle(child);
status = acpi_pwr_switch_consumer(h, acpi_state);
@ -222,9 +226,11 @@ acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
"Failed to set ACPI power state D%d on %s: %s\n",
acpi_state, acpi_name(h), AcpiFormatException(status));
if (old_state > state)
return (pci_set_powerstate_method(dev, child, state));
else
return (0);
error = pci_set_powerstate_method(dev, child, state);
out:
ACPI_SERIAL_END(pci_powerstate);
return (error);
}
static void