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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-14 12:50:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-14 12:50:05 -0700
commitb41d037a1fd32d6535a2eef877b10f8deefeaf70 (patch)
treedaecbd26a3e80545f9d3bab99e07395aaf1b9678
parentef98988ba369da88bab8a4d457407e71bbe160fa (diff)
parent522533f338f38e15106d5f58901f38fe7bd6a7d8 (diff)
downloadlinux-sh-b41d037a1fd32d6535a2eef877b10f8deefeaf70.tar.gz
Merge tag 'acpi-extra-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki: "This includes a couple of fixes needed after recent changes, two ACPI driver fixes (fan and "Processor Aggregator"), an update of the ACPI device properties handling code and a new MAINTAINERS entry for ACPI on ARM64. Specifics: - Fix an unused function warning that started to appear after recent changes in the ACPI EC driver (Eric Biggers). - Fix the KERN_CONT usage in acpi_os_vprintf() that has become (particularly) annoying recently (Joe Perches). - Fix the fan status checking in the ACPI fan driver to avoid returning incorrect error codes sometimes (Srinivas Pandruvada). - Fix the ACPI Processor Aggregator driver (PAD) to always let the special processor_aggregator driver from Xen take over when running as Xen dom0 (Juergen Gross). - Update the handling of reference device properties in ACPI by allowing empty rows ("holes") to appear in reference property lists (Mika Westerberg). - Add a new MAINTAINERS entry for ACPI on ARM64 (Lorenzo Pieralisi)" * tag 'acpi-extra-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: acpi_os_vprintf: Use printk_get_level() to avoid unnecessary KERN_CONT ACPI / PAD: don't register acpi_pad driver if running as Xen dom0 ACPI / property: Allow holes in reference properties MAINTAINERS: Add ARM64-specific ACPI maintainers entry ACPI / EC: Fix unused function warning when CONFIG_PM_SLEEP=n ACPI / fan: Fix error reading cur_state
-rw-r--r--MAINTAINERS8
-rw-r--r--drivers/acpi/acpi_pad.c5
-rw-r--r--drivers/acpi/ec.c2
-rw-r--r--drivers/acpi/fan.c12
-rw-r--r--drivers/acpi/osl.c13
-rw-r--r--drivers/acpi/property.c117
-rw-r--r--include/linux/acpi.h22
7 files changed, 123 insertions, 56 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index fc849cabf99e..146d1498aa01 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -316,6 +316,14 @@ W: https://01.org/linux-acpi
S: Supported
F: drivers/acpi/fan.c
+ACPI FOR ARM64 (ACPI/arm64)
+M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+M: Hanjun Guo <hanjun.guo@linaro.org>
+M: Sudeep Holla <sudeep.holla@arm.com>
+L: linux-acpi@vger.kernel.org
+S: Maintained
+F: drivers/acpi/arm64
+
ACPI THERMAL DRIVER
M: Zhang Rui <rui.zhang@intel.com>
L: linux-acpi@vger.kernel.org
diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 8ea8211b2d58..eb76a4c10dbf 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/acpi.h>
#include <asm/mwait.h>
+#include <xen/xen.h>
#define ACPI_PROCESSOR_AGGREGATOR_CLASS "acpi_pad"
#define ACPI_PROCESSOR_AGGREGATOR_DEVICE_NAME "Processor Aggregator"
@@ -477,6 +478,10 @@ static struct acpi_driver acpi_pad_driver = {
static int __init acpi_pad_init(void)
{
+ /* Xen ACPI PAD is used when running as Xen Dom0. */
+ if (xen_initial_domain())
+ return -ENODEV;
+
power_saving_mwait_init();
if (power_saving_mwait_eax == 0)
return -EINVAL;
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 680531062160..48e19d013170 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -526,6 +526,7 @@ static void acpi_ec_enable_event(struct acpi_ec *ec)
acpi_ec_clear(ec);
}
+#ifdef CONFIG_PM_SLEEP
static bool acpi_ec_query_flushed(struct acpi_ec *ec)
{
bool flushed;
@@ -557,6 +558,7 @@ static void acpi_ec_disable_event(struct acpi_ec *ec)
spin_unlock_irqrestore(&ec->lock, flags);
__acpi_ec_flush_event(ec);
}
+#endif /* CONFIG_PM_SLEEP */
static bool acpi_ec_guard_event(struct acpi_ec *ec)
{
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index 384cfc3083e1..6cf4988206f2 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -129,8 +129,18 @@ static int fan_get_state_acpi4(struct acpi_device *device, unsigned long *state)
control = obj->package.elements[1].integer.value;
for (i = 0; i < fan->fps_count; i++) {
- if (control == fan->fps[i].control)
+ /*
+ * When Fine Grain Control is set, return the state
+ * corresponding to maximum fan->fps[i].control
+ * value compared to the current speed. Here the
+ * fan->fps[] is sorted array with increasing speed.
+ */
+ if (fan->fif.fine_grain_ctrl && control < fan->fps[i].control) {
+ i = (i > 0) ? i - 1 : 0;
break;
+ } else if (control == fan->fps[i].control) {
+ break;
+ }
}
if (i == fan->fps_count) {
dev_dbg(&device->dev, "Invalid control value returned\n");
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 4305ee9db4b2..416953a42510 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -162,11 +162,18 @@ void acpi_os_vprintf(const char *fmt, va_list args)
if (acpi_in_debugger) {
kdb_printf("%s", buffer);
} else {
- printk(KERN_CONT "%s", buffer);
+ if (printk_get_level(buffer))
+ printk("%s", buffer);
+ else
+ printk(KERN_CONT "%s", buffer);
}
#else
- if (acpi_debugger_write_log(buffer) < 0)
- printk(KERN_CONT "%s", buffer);
+ if (acpi_debugger_write_log(buffer) < 0) {
+ if (printk_get_level(buffer))
+ printk("%s", buffer);
+ else
+ printk(KERN_CONT "%s", buffer);
+ }
#endif
}
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index f2fd3fee588a..03f5ec11ab31 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -468,10 +468,11 @@ static int acpi_data_get_property_array(struct acpi_device_data *data,
}
/**
- * acpi_data_get_property_reference - returns handle to the referenced object
- * @data: ACPI device data object containing the property
+ * __acpi_node_get_property_reference - returns handle to the referenced object
+ * @fwnode: Firmware node to get the property from
* @propname: Name of the property
* @index: Index of the reference to return
+ * @num_args: Maximum number of arguments after each reference
* @args: Location to store the returned reference with optional arguments
*
* Find property with @name, verifify that it is a package containing at least
@@ -482,17 +483,40 @@ static int acpi_data_get_property_array(struct acpi_device_data *data,
* If there's more than one reference in the property value package, @index is
* used to select the one to return.
*
+ * It is possible to leave holes in the property value set like in the
+ * example below:
+ *
+ * Package () {
+ * "cs-gpios",
+ * Package () {
+ * ^GPIO, 19, 0, 0,
+ * ^GPIO, 20, 0, 0,
+ * 0,
+ * ^GPIO, 21, 0, 0,
+ * }
+ * }
+ *
+ * Calling this function with index %2 return %-ENOENT and with index %3
+ * returns the last entry. If the property does not contain any more values
+ * %-ENODATA is returned. The NULL entry must be single integer and
+ * preferably contain value %0.
+ *
* Return: %0 on success, negative error code on failure.
*/
-static int acpi_data_get_property_reference(struct acpi_device_data *data,
- const char *propname, size_t index,
- struct acpi_reference_args *args)
+int __acpi_node_get_property_reference(struct fwnode_handle *fwnode,
+ const char *propname, size_t index, size_t num_args,
+ struct acpi_reference_args *args)
{
const union acpi_object *element, *end;
const union acpi_object *obj;
+ struct acpi_device_data *data;
struct acpi_device *device;
int ret, idx = 0;
+ data = acpi_device_data_of_node(fwnode);
+ if (!data)
+ return -EINVAL;
+
ret = acpi_data_get_property(data, propname, ACPI_TYPE_ANY, &obj);
if (ret)
return ret;
@@ -532,59 +556,54 @@ static int acpi_data_get_property_reference(struct acpi_device_data *data,
while (element < end) {
u32 nargs, i;
- if (element->type != ACPI_TYPE_LOCAL_REFERENCE)
- return -EPROTO;
-
- ret = acpi_bus_get_device(element->reference.handle, &device);
- if (ret)
- return -ENODEV;
-
- element++;
- nargs = 0;
-
- /* assume following integer elements are all args */
- for (i = 0; element + i < end; i++) {
- int type = element[i].type;
+ if (element->type == ACPI_TYPE_LOCAL_REFERENCE) {
+ ret = acpi_bus_get_device(element->reference.handle,
+ &device);
+ if (ret)
+ return -ENODEV;
+
+ nargs = 0;
+ element++;
+
+ /* assume following integer elements are all args */
+ for (i = 0; element + i < end && i < num_args; i++) {
+ int type = element[i].type;
+
+ if (type == ACPI_TYPE_INTEGER)
+ nargs++;
+ else if (type == ACPI_TYPE_LOCAL_REFERENCE)
+ break;
+ else
+ return -EPROTO;
+ }
- if (type == ACPI_TYPE_INTEGER)
- nargs++;
- else if (type == ACPI_TYPE_LOCAL_REFERENCE)
- break;
- else
+ if (nargs > MAX_ACPI_REFERENCE_ARGS)
return -EPROTO;
- }
- if (idx++ == index) {
- args->adev = device;
- args->nargs = nargs;
- for (i = 0; i < nargs; i++)
- args->args[i] = element[i].integer.value;
+ if (idx == index) {
+ args->adev = device;
+ args->nargs = nargs;
+ for (i = 0; i < nargs; i++)
+ args->args[i] = element[i].integer.value;
- return 0;
+ return 0;
+ }
+
+ element += nargs;
+ } else if (element->type == ACPI_TYPE_INTEGER) {
+ if (idx == index)
+ return -ENOENT;
+ element++;
+ } else {
+ return -EPROTO;
}
- element += nargs;
+ idx++;
}
- return -EPROTO;
-}
-
-/**
- * acpi_node_get_property_reference - get a handle to the referenced object.
- * @fwnode: Firmware node to get the property from.
- * @propname: Name of the property.
- * @index: Index of the reference to return.
- * @args: Location to store the returned reference with optional arguments.
- */
-int acpi_node_get_property_reference(struct fwnode_handle *fwnode,
- const char *name, size_t index,
- struct acpi_reference_args *args)
-{
- struct acpi_device_data *data = acpi_device_data_of_node(fwnode);
-
- return data ? acpi_data_get_property_reference(data, name, index, args) : -EINVAL;
+ return -ENODATA;
}
-EXPORT_SYMBOL_GPL(acpi_node_get_property_reference);
+EXPORT_SYMBOL_GPL(__acpi_node_get_property_reference);
static int acpi_data_prop_read_single(struct acpi_device_data *data,
const char *propname,
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 94afcb2c384c..ddbeda6dbdc8 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -946,9 +946,17 @@ struct acpi_reference_args {
#ifdef CONFIG_ACPI
int acpi_dev_get_property(struct acpi_device *adev, const char *name,
acpi_object_type type, const union acpi_object **obj);
-int acpi_node_get_property_reference(struct fwnode_handle *fwnode,
- const char *name, size_t index,
- struct acpi_reference_args *args);
+int __acpi_node_get_property_reference(struct fwnode_handle *fwnode,
+ const char *name, size_t index, size_t num_args,
+ struct acpi_reference_args *args);
+
+static inline int acpi_node_get_property_reference(struct fwnode_handle *fwnode,
+ const char *name, size_t index,
+ struct acpi_reference_args *args)
+{
+ return __acpi_node_get_property_reference(fwnode, name, index,
+ MAX_ACPI_REFERENCE_ARGS, args);
+}
int acpi_node_prop_get(struct fwnode_handle *fwnode, const char *propname,
void **valptr);
@@ -1024,6 +1032,14 @@ static inline int acpi_dev_get_property(struct acpi_device *adev,
return -ENXIO;
}
+static inline int
+__acpi_node_get_property_reference(struct fwnode_handle *fwnode,
+ const char *name, size_t index, size_t num_args,
+ struct acpi_reference_args *args)
+{
+ return -ENXIO;
+}
+
static inline int acpi_node_get_property_reference(struct fwnode_handle *fwnode,
const char *name, size_t index,
struct acpi_reference_args *args)