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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-05 10:06:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-05 10:06:06 -0700
commit59068e369b6a2a0a15b93624887525d9ec0f36e5 (patch)
tree7d165bb50d379e37ca7f0b3fed5da9f7719e22e4 /drivers/acpi
parent377485f6244af255b04d662cf19cddbbc4ae4310 (diff)
parent1cc0c998fdf2cb665d625fb565a0d6db5c81c639 (diff)
downloadop-kernel-dev-59068e369b6a2a0a15b93624887525d9ec0f36e5.zip
op-kernel-dev-59068e369b6a2a0a15b93624887525d9ec0f36e5.tar.gz
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull an ACPI patch from Len Brown: "It fixes a D3 issue new in 3.4-rc1." By Lin Ming via Len Brown: * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: ACPI: Fix D3hot v D3cold confusion
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/power.c2
-rw-r--r--drivers/acpi/scan.c17
2 files changed, 8 insertions, 11 deletions
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 7049a7d..330bb4d 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -631,7 +631,7 @@ int acpi_power_get_inferred_state(struct acpi_device *device, int *state)
* We know a device's inferred power state when all the resources
* required for a given D-state are 'on'.
*/
- for (i = ACPI_STATE_D0; i < ACPI_STATE_D3; i++) {
+ for (i = ACPI_STATE_D0; i < ACPI_STATE_D3_HOT; i++) {
list = &device->power.states[i].resources;
if (list->count < 1)
continue;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 767e2dc..7417267 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -869,7 +869,7 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
/*
* Enumerate supported power management states
*/
- for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
+ for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
struct acpi_device_power_state *ps = &device->power.states[i];
char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
@@ -884,21 +884,18 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
acpi_bus_add_power_resource(ps->resources.handles[j]);
}
- /* The exist of _PR3 indicates D3Cold support */
- if (i == ACPI_STATE_D3) {
- status = acpi_get_handle(device->handle, object_name, &handle);
- if (ACPI_SUCCESS(status))
- device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1;
- }
-
/* Evaluate "_PSx" to see if we can do explicit sets */
object_name[2] = 'S';
status = acpi_get_handle(device->handle, object_name, &handle);
if (ACPI_SUCCESS(status))
ps->flags.explicit_set = 1;
- /* State is valid if we have some power control */
- if (ps->resources.count || ps->flags.explicit_set)
+ /*
+ * State is valid if there are means to put the device into it.
+ * D3hot is only valid if _PR3 present.
+ */
+ if (ps->resources.count ||
+ (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT))
ps->flags.valid = 1;
ps->power = -1; /* Unknown - driver assigned */
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