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ACPI fixes for v4.7-rc2

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- Fix an incorrect check introduced by recent ACPICA changes which
    causes problems with booting KVM guests to happen, among other
    things (Lv Zheng).
 
  - Fix a backlight issue introduced by recent changes to the ACPI
    video driver (Aaron Lu).
 
  - Fix the ACPI processor initialization which attempts to register
    an IO region without checking if that really is necessary and
    sometimes prevents drivers loaded subsequently from registering
    their resources which leads to boot issues (Rafael Wysocki).
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Merge tag 'acpi-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "Two fixes for problems introduced recently (ACPICA and the ACPI
  backlight driver) and one fix for an older issue that prevents at
  least one system from booting.

  Specifics:

   - Fix an incorrect check introduced by recent ACPICA changes which
     causes problems with booting KVM guests to happen, among other
     things (Lv Zheng).

   - Fix a backlight issue introduced by recent changes to the ACPI
     video driver (Aaron Lu).

   - Fix the ACPI processor initialization which attempts to register an
     IO region without checking if that really is necessary and
     sometimes prevents drivers loaded subsequently from registering
     their resources which leads to boot issues (Rafael Wysocki)"

* tag 'acpi-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / processor: Avoid reserving IO regions too early
  ACPICA / Hardware: Fix old register check in acpi_hw_get_access_bit_width()
  ACPI / Thermal / video: fix max_level incorrect value
This commit is contained in:
Linus Torvalds 2016-06-04 11:26:49 -07:00
commit eb10a7b7be
6 changed files with 29 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

9
drivers/acpi/acpi_processor.c
View file

@ -331,15 +331,6 @@ static int acpi_processor_get_info(struct acpi_device *device)
pr->throttling.duty_width = acpi_gbl_FADT.duty_width;
pr->pblk = object.processor.pblk_address;
/*
* We don't care about error returns - we just try to mark
* these reserved so that nobody else is confused into thinking
* that this region might be unused..
*
* (In particular, allocating the IO range for Cardbus)
*/
request_region(pr->throttling.address, 6, "ACPI CPU throttle");
}
/*

9
drivers/acpi/acpi_video.c
View file

@ -754,7 +754,8 @@ static int acpi_video_bqc_quirk(struct acpi_video_device *device,
}
int acpi_video_get_levels(struct acpi_device *device,
struct acpi_video_device_brightness **dev_br)
struct acpi_video_device_brightness **dev_br,
int *pmax_level)
{
union acpi_object *obj = NULL;
int i, max_level = 0, count = 0, level_ac_battery = 0;
@ -841,6 +842,8 @@ int acpi_video_get_levels(struct acpi_device *device,
br->count = count;
*dev_br = br;
if (pmax_level)
*pmax_level = max_level;
out:
kfree(obj);
@ -869,7 +872,7 @@ acpi_video_init_brightness(struct acpi_video_device *device)
struct acpi_video_device_brightness *br = NULL;
int result = -EINVAL;
result = acpi_video_get_levels(device->dev, &br);
result = acpi_video_get_levels(device->dev, &br, &max_level);
if (result)
return result;
device->brightness = br;
@ -1737,7 +1740,7 @@ static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video)
mutex_lock(&video->device_list_lock);
list_for_each_entry(dev, &video->video_device_list, entry) {
if (!acpi_video_device_lcd_query_levels(dev, &levels))
if (!acpi_video_device_lcd_query_levels(dev->dev->handle, &levels))
kfree(levels);
}
mutex_unlock(&video->device_list_lock);

23
drivers/acpi/acpica/hwregs.c
View file

@ -83,27 +83,22 @@ acpi_hw_write_multiple(u32 value,
static u8
acpi_hw_get_access_bit_width(struct acpi_generic_address *reg, u8 max_bit_width)
{
u64 address;
if (!reg->access_width) {
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
max_bit_width = 32;
}
/*
* Detect old register descriptors where only the bit_width field
* makes senses. The target address is copied to handle possible
* alignment issues.
* makes senses.
*/
ACPI_MOVE_64_TO_64(&address, &reg->address);
if (!reg->bit_offset && reg->bit_width &&
if (reg->bit_width < max_bit_width &&
!reg->bit_offset && reg->bit_width &&
ACPI_IS_POWER_OF_TWO(reg->bit_width) &&
ACPI_IS_ALIGNED(reg->bit_width, 8) &&
ACPI_IS_ALIGNED(address, reg->bit_width)) {
ACPI_IS_ALIGNED(reg->bit_width, 8)) {
return (reg->bit_width);
} else {
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
return (32);
} else {
return (max_bit_width);
}
}
return (max_bit_width);
} else {
return (1 << (reg->access_width + 2));
}

9
drivers/acpi/processor_throttling.c
View file

@ -676,6 +676,15 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
if (!pr->flags.throttling)
return -ENODEV;
/*
* We don't care about error returns - we just try to mark
* these reserved so that nobody else is confused into thinking
* that this region might be unused..
*
* (In particular, allocating the IO range for Cardbus)
*/
request_region(pr->throttling.address, 6, "ACPI CPU throttle");
pr->throttling.state = 0;
duty_mask = pr->throttling.state_count - 1;

2
drivers/thermal/int340x_thermal/int3406_thermal.c
View file

@ -177,7 +177,7 @@ static int int3406_thermal_probe(struct platform_device *pdev)
return -ENODEV;
d->raw_bd = bd;
ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br);
ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br, NULL);
if (ret)
return ret;

6
include/acpi/video.h
View file

@ -51,7 +51,8 @@ extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
*/
extern bool acpi_video_handles_brightness_key_presses(void);
extern int acpi_video_get_levels(struct acpi_device *device,
struct acpi_video_device_brightness **dev_br);
struct acpi_video_device_brightness **dev_br,
int *pmax_level);
#else
static inline int acpi_video_register(void) { return 0; }
static inline void acpi_video_unregister(void) { return; }
@ -72,7 +73,8 @@ static inline bool acpi_video_handles_brightness_key_presses(void)
return false;
}
static inline int acpi_video_get_levels(struct acpi_device *device,
struct acpi_video_device_brightness **dev_br)
struct acpi_video_device_brightness **dev_br,
int *pmax_level)
{
return -ENODEV;
}