Merge branch 'acpi-assorted' into linux-next

* acpi-assorted:
  PCI / ACPI: Don't query OSC support with all possible controls
  ACPI / processor_thermal: avoid null pointer deference error
  ACPI / fan: avoid null pointer deference error
  ACPI / video: Fix applying indexed initial brightness value.
  ACPI / video: Make logic a little easier to understand.
  ACPI / video: Fix brightness control initialization for some laptops.
  ACPI: Use resource_size() in osl.c
  ACPI / acpi_pad: Used PTR_RET
  ACPI: suppress compiler warning in container.c
  ACPI: suppress compiler warning in battery.c
  ACPI: suppress compiler warnings in processor_throttling.c
  ACPI: suppress compiler warnings in button.c
  ACPI: replace kmalloc+memcpy with kmemdup
  ACPI: Remove acpi_pci_bind_root() definition
  ACPI video: ignore BIOS backlight value for HP dm4

12 files changed, 107 insertions, 57 deletions

diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 31de1043eea0..27bb6a91de5f 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -236,7 +236,7 @@ static int create_power_saving_task(void)
 	ps_tsks[ps_tsk_num] = kthread_run(power_saving_thread,
 		(void *)(unsigned long)ps_tsk_num,
 		"acpi_pad/%d", ps_tsk_num);
-	rc = IS_ERR(ps_tsks[ps_tsk_num]) ? PTR_ERR(ps_tsks[ps_tsk_num]) : 0;
+	rc = PTR_RET(ps_tsks[ps_tsk_num]);
 	if (!rc)
 		ps_tsk_num++;
 	else
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index c5cd5b5513e6..0cc384b72943 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -146,7 +146,7 @@ struct acpi_battery {
 
 #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat)
 
-inline int acpi_battery_present(struct acpi_battery *battery)
+static inline int acpi_battery_present(struct acpi_battery *battery)
 {
 	return battery->device->status.battery_present;
 }
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 01708a165368..292de3cab9cc 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -288,13 +288,12 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
 	}
 out_success:
 	context->ret.length = out_obj->buffer.length;
-	context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL);
+	context->ret.pointer = kmemdup(out_obj->buffer.pointer,
+				       context->ret.length, GFP_KERNEL);
 	if (!context->ret.pointer) {
 		status =  AE_NO_MEMORY;
 		goto out_kfree;
 	}
-	memcpy(context->ret.pointer, out_obj->buffer.pointer,
-		context->ret.length);
 	status =  AE_OK;
 
 out_kfree:
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 86c7d5445c38..92a659aa6396 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -33,6 +33,7 @@
 #include <linux/slab.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
+#include <acpi/button.h>
 
 #define PREFIX "ACPI: "
 
diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index f9f8a08827fa..e23151667655 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -30,6 +30,8 @@
 
 #include "internal.h"
 
+#include "internal.h"
+
 #define PREFIX "ACPI: "
 
 #define _COMPONENT			ACPI_CONTAINER_COMPONENT
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index f815da82c765..8d1c0105e113 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -174,9 +174,13 @@ static int acpi_fan_add(struct acpi_device *device)
 
 static int acpi_fan_remove(struct acpi_device *device)
 {
-	struct thermal_cooling_device *cdev = acpi_driver_data(device);
+	struct thermal_cooling_device *cdev;
+
+	if (!device)
+		return -EINVAL;
 
-	if (!device || !cdev)
+	cdev =  acpi_driver_data(device);
+	if (!cdev)
 		return -EINVAL;
 
 	sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 586e7e993d3d..4d31748faca3 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1555,7 +1555,7 @@ int acpi_check_resource_conflict(const struct resource *res)
 	else
 		space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
 
-	length = res->end - res->start + 1;
+	length = resource_size(res);
 	if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
 		warn = 1;
 	clash = acpi_check_address_range(space_id, res->start, length, warn);
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 6ae5e440436e..4241b8d844eb 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -201,8 +201,8 @@ static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,
 		*control &= OSC_PCI_CONTROL_MASKS;
 		capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set;
 	} else {
-		/* Run _OSC query for all possible controls. */
-		capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS;
+		/* Run _OSC query only with existing controls. */
+		capbuf[OSC_CONTROL_TYPE] = root->osc_control_set;
 	}
 
 	status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 641b5450a0db..e8e652710e65 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -218,9 +218,13 @@ processor_get_max_state(struct thermal_cooling_device *cdev,
 			unsigned long *state)
 {
 	struct acpi_device *device = cdev->devdata;
-	struct acpi_processor *pr = acpi_driver_data(device);
+	struct acpi_processor *pr;
 
-	if (!device || !pr)
+	if (!device)
+		return -EINVAL;
+
+	pr = acpi_driver_data(device);
+	if (!pr)
 		return -EINVAL;
 
 	*state = acpi_processor_max_state(pr);
@@ -232,9 +236,13 @@ processor_get_cur_state(struct thermal_cooling_device *cdev,
 			unsigned long *cur_state)
 {
 	struct acpi_device *device = cdev->devdata;
-	struct acpi_processor *pr = acpi_driver_data(device);
+	struct acpi_processor *pr;
 
-	if (!device || !pr)
+	if (!device)
+		return -EINVAL;
+
+	pr = acpi_driver_data(device);
+	if (!pr)
 		return -EINVAL;
 
 	*cur_state = cpufreq_get_cur_state(pr->id);
@@ -248,11 +256,15 @@ processor_set_cur_state(struct thermal_cooling_device *cdev,
 			unsigned long state)
 {
 	struct acpi_device *device = cdev->devdata;
-	struct acpi_processor *pr = acpi_driver_data(device);
+	struct acpi_processor *pr;
 	int result = 0;
 	int max_pstate;
 
-	if (!device || !pr)
+	if (!device)
+		return -EINVAL;
+
+	pr = acpi_driver_data(device);
+	if (!pr)
 		return -EINVAL;
 
 	max_pstate = cpufreq_get_max_state(pr->id);
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index 1d02b7b5ade0..e7dd2c1fee79 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -211,9 +211,10 @@ err_ret:
  */
 void acpi_processor_throttling_init(void)
 {
-	if (acpi_processor_update_tsd_coord())
+	if (acpi_processor_update_tsd_coord()) {
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 			"Assume no T-state coordination\n"));
+	}
 
 	return;
 }
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 313f959413dc..3cdd0471bc63 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -222,7 +222,7 @@ static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
 			int level);
 static int acpi_video_device_lcd_get_level_current(
 			struct acpi_video_device *device,
-			unsigned long long *level, int init);
+			unsigned long long *level, bool raw);
 static int acpi_video_get_next_level(struct acpi_video_device *device,
 				     u32 level_current, u32 event);
 static int acpi_video_switch_brightness(struct acpi_video_device *device,
@@ -236,7 +236,7 @@ static int acpi_video_get_brightness(struct backlight_device *bd)
 	struct acpi_video_device *vd =
 		(struct acpi_video_device *)bl_get_data(bd);
 
-	if (acpi_video_device_lcd_get_level_current(vd, &cur_level, 0))
+	if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false))
 		return -EINVAL;
 	for (i = 2; i < vd->brightness->count; i++) {
 		if (vd->brightness->levels[i] == cur_level)
@@ -281,7 +281,7 @@ static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsig
 	unsigned long long level;
 	int offset;
 
-	if (acpi_video_device_lcd_get_level_current(video, &level, 0))
+	if (acpi_video_device_lcd_get_level_current(video, &level, false))
 		return -EINVAL;
 	for (offset = 2; offset < video->brightness->count; offset++)
 		if (level == video->brightness->levels[offset]) {
@@ -447,12 +447,45 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
 		},
 	},
+	{
+	 .callback = video_ignore_initial_backlight,
+	 .ident = "HP Pavilion dm4",
+	 .matches = {
+		DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"),
+		},
+	},
 	{}
 };
 
+static unsigned long long
+acpi_video_bqc_value_to_level(struct acpi_video_device *device,
+			      unsigned long long bqc_value)
+{
+	unsigned long long level;
+
+	if (device->brightness->flags._BQC_use_index) {
+		/*
+		 * _BQC returns an index that doesn't account for
+		 * the first 2 items with special meaning, so we need
+		 * to compensate for that by offsetting ourselves
+		 */
+		if (device->brightness->flags._BCL_reversed)
+			bqc_value = device->brightness->count - 3 - bqc_value;
+
+		level = device->brightness->levels[bqc_value + 2];
+	} else {
+		level = bqc_value;
+	}
+
+	level += bqc_offset_aml_bug_workaround;
+
+	return level;
+}
+
 static int
 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
-					unsigned long long *level, int init)
+					unsigned long long *level, bool raw)
 {
 	acpi_status status = AE_OK;
 	int i;
@@ -463,29 +496,30 @@ acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
 		status = acpi_evaluate_integer(device->dev->handle, buf,
 						NULL, level);
 		if (ACPI_SUCCESS(status)) {
-			if (device->brightness->flags._BQC_use_index) {
-				if (device->brightness->flags._BCL_reversed)
-					*level = device->brightness->count
-								 - 3 - (*level);
-				*level = device->brightness->levels[*level + 2];
-
+			if (raw) {
+				/*
+				 * Caller has indicated he wants the raw
+				 * value returned by _BQC, so don't furtherly
+				 * mess with the value.
+				 */
+				return 0;
 			}
-			*level += bqc_offset_aml_bug_workaround;
+
+			*level = acpi_video_bqc_value_to_level(device, *level);
+
 			for (i = 2; i < device->brightness->count; i++)
 				if (device->brightness->levels[i] == *level) {
 					device->brightness->curr = *level;
 					return 0;
 			}
-			if (!init) {
-				/*
-				 * BQC returned an invalid level.
-				 * Stop using it.
-				 */
-				ACPI_WARNING((AE_INFO,
-					      "%s returned an invalid level",
-					      buf));
-				device->cap._BQC = device->cap._BCQ = 0;
-			}
+			/*
+			 * BQC returned an invalid level.
+			 * Stop using it.
+			 */
+			ACPI_WARNING((AE_INFO,
+				      "%s returned an invalid level",
+				      buf));
+			device->cap._BQC = device->cap._BCQ = 0;
 		} else {
 			/* Fixme:
 			 * should we return an error or ignore this failure?
@@ -703,7 +737,8 @@ acpi_video_init_brightness(struct acpi_video_device *device)
 	if (!device->cap._BQC)
 		goto set_level;
 
-	result = acpi_video_device_lcd_get_level_current(device, &level_old, 1);
+	result = acpi_video_device_lcd_get_level_current(device,
+							 &level_old, true);
 	if (result)
 		goto out_free_levels;
 
@@ -714,31 +749,27 @@ acpi_video_init_brightness(struct acpi_video_device *device)
 	if (result)
 		goto out_free_levels;
 
-	result = acpi_video_device_lcd_get_level_current(device, &level, 0);
+	result = acpi_video_device_lcd_get_level_current(device, &level, true);
 	if (result)
 		goto out_free_levels;
 
 	br->flags._BQC_use_index = (level == max_level ? 0 : 1);
 
-	if (!br->flags._BQC_use_index) {
+	if (use_bios_initial_backlight) {
+		level = acpi_video_bqc_value_to_level(device, level_old);
 		/*
-		 * Set the backlight to the initial state.
-		 * On some buggy laptops, _BQC returns an uninitialized value
-		 * when invoked for the first time, i.e. level_old is invalid.
-		 * set the backlight to max_level in this case
+		 * On some buggy laptops, _BQC returns an uninitialized
+		 * value when invoked for the first time, i.e.
+		 * level_old is invalid (no matter whether it's a level
+		 * or an index). Set the backlight to max_level in this case.
 		 */
-		if (use_bios_initial_backlight) {
-			for (i = 2; i < br->count; i++)
-				if (level_old == br->levels[i])
-					level = level_old;
-		}
-		goto set_level;
+		for (i = 2; i < br->count; i++)
+			if (level_old == br->levels[i])
+				break;
+		if (i == br->count)
+			level = max_level;
 	}
 
-	if (br->flags._BCL_reversed)
-		level_old = (br->count - 1) - level_old;
-	level = br->levels[level_old];
-
 set_level:
 	result = acpi_video_device_lcd_set_level(device, level);
 	if (result)
@@ -1268,7 +1299,8 @@ acpi_video_switch_brightness(struct acpi_video_device *device, int event)
 		goto out;
 
 	result = acpi_video_device_lcd_get_level_current(device,
-							 &level_current, 0);
+							 &level_current,
+							 false);
 	if (result)
 		goto out;
 
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index 627749af0ba7..e6168a24b9f0 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -95,7 +95,6 @@ int acpi_pci_link_free_irq(acpi_handle handle);
 struct pci_bus;
 
 struct pci_dev *acpi_get_pci_dev(acpi_handle);
-int acpi_pci_bind_root(struct acpi_device *device);
 
 /* Arch-defined function to add a bus to the system */