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-rw-r--r--Documentation/laptops/thinkpad-acpi.txt2
-rw-r--r--drivers/platform/x86/thinkpad_acpi.c40
2 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index f6e6bc66eed3..e8f52fbadfe0 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -1484,6 +1484,8 @@ will enable all debugging output classes. It takes a bitmask, so
to enable more than one output class, just add their values.
Debug bitmask Description
+ 0x8000 Disclose PID of userspace programs
+ accessing some functions of the driver
0x0001 Initialization and probing
0x0002 Removal
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 6331b88d77d9..852be7c1a172 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -54,6 +54,7 @@
#include <linux/string.h>
#include <linux/list.h>
#include <linux/mutex.h>
+#include <linux/sched.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/delay.h>
@@ -185,6 +186,7 @@ enum {
/* Debugging printk groups */
#define TPACPI_DBG_ALL 0xffff
+#define TPACPI_DBG_DISCLOSETASK 0x8000
#define TPACPI_DBG_INIT 0x0001
#define TPACPI_DBG_EXIT 0x0002
@@ -335,6 +337,21 @@ static const char *str_supported(int is_supported);
do { } while (0)
#endif
+static void tpacpi_log_usertask(const char * const what)
+{
+ printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
+ what, task_tgid_vnr(current));
+}
+
+#define tpacpi_disclose_usertask(what, format, arg...) \
+ do { \
+ if (unlikely( \
+ (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
+ (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
+ printk(TPACPI_DEBUG "%s: PID %d: " format, \
+ what, task_tgid_vnr(current), ## arg); \
+ } \
+ } while (0)
/****************************************************************************
****************************************************************************
@@ -1030,6 +1047,21 @@ static int __init tpacpi_new_rfkill(const unsigned int id,
return 0;
}
+static void printk_deprecated_attribute(const char * const what,
+ const char * const details)
+{
+ tpacpi_log_usertask("deprecated sysfs attribute");
+ printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
+ "will be removed. %s\n",
+ what, details);
+}
+
+static void printk_deprecated_rfkill_attribute(const char * const what)
+{
+ printk_deprecated_attribute(what,
+ "Please switch to generic rfkill before year 2010");
+}
+
/*************************************************************************
* thinkpad-acpi driver attributes
*/
@@ -3070,6 +3102,8 @@ static ssize_t bluetooth_enable_show(struct device *dev,
{
int status;
+ printk_deprecated_rfkill_attribute("bluetooth_enable");
+
status = bluetooth_get_radiosw();
if (status < 0)
return status;
@@ -3085,6 +3119,8 @@ static ssize_t bluetooth_enable_store(struct device *dev,
unsigned long t;
int res;
+ printk_deprecated_rfkill_attribute("bluetooth_enable");
+
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
@@ -3347,6 +3383,8 @@ static ssize_t wan_enable_show(struct device *dev,
{
int status;
+ printk_deprecated_rfkill_attribute("wwan_enable");
+
status = wan_get_radiosw();
if (status < 0)
return status;
@@ -3362,6 +3400,8 @@ static ssize_t wan_enable_store(struct device *dev,
unsigned long t;
int res;
+ printk_deprecated_rfkill_attribute("wwan_enable");
+
if (parse_strtoul(buf, 1, &t))
return -EINVAL;