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ACPI: SBS: Ignore alarms coming from unknown devices

Browse Source 
http://bugzilla.kernel.org/show_bug.cgi?id=9362

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy 2007-12-08 13:02:40 +03:00 committed by Len Brown
parent 09f1fb41ad
commit c2d00f2d1b
3 changed files with 18 additions and 10 deletions
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6
drivers/acpi/sbs.c
View File

@ -54,12 +54,6 @@
#define ACPI_BATTERY_DIR_NAME "BAT%i" #define ACPI_BATTERY_DIR_NAME "BAT%i"
#define ACPI_AC_DIR_NAME "AC0" #define ACPI_AC_DIR_NAME "AC0"
enum acpi_sbs_device_addr {
ACPI_SBS_CHARGER = 0x9,
ACPI_SBS_MANAGER = 0xa,
ACPI_SBS_BATTERY = 0xb,
};
#define ACPI_SBS_NOTIFY_STATUS 0x80 #define ACPI_SBS_NOTIFY_STATUS 0x80
#define ACPI_SBS_NOTIFY_INFO 0x81 #define ACPI_SBS_NOTIFY_INFO 0x81

16
drivers/acpi/sbshc.c
View File

@ -202,10 +202,9 @@ int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc)
EXPORT_SYMBOL_GPL(acpi_smbus_unregister_callback); EXPORT_SYMBOL_GPL(acpi_smbus_unregister_callback);
static void acpi_smbus_callback(void *context) static inline void acpi_smbus_callback(void *context)
{ {
struct acpi_smb_hc *hc = context; struct acpi_smb_hc *hc = context;
if (hc->callback) if (hc->callback)
hc->callback(hc->context); hc->callback(hc->context);
} }
@ -214,6 +213,7 @@ static int smbus_alarm(void *context)
{ {
struct acpi_smb_hc *hc = context; struct acpi_smb_hc *hc = context;
union acpi_smb_status status; union acpi_smb_status status;
u8 address;
if (smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw)) if (smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw))
return 0; return 0;
/* Check if it is only a completion notify */ /* Check if it is only a completion notify */
@ -222,10 +222,18 @@ static int smbus_alarm(void *context)
if (!status.fields.alarm) if (!status.fields.alarm)
return 0; return 0;
mutex_lock(&hc->lock); mutex_lock(&hc->lock);
smb_hc_read(hc, ACPI_SMB_ALARM_ADDRESS, &address);
status.fields.alarm = 0; status.fields.alarm = 0;
smb_hc_write(hc, ACPI_SMB_STATUS, status.raw); smb_hc_write(hc, ACPI_SMB_STATUS, status.raw);
if (hc->callback) /* We are only interested in events coming from known devices */
acpi_os_execute(OSL_GPE_HANDLER, acpi_smbus_callback, hc); switch (address >> 1) {
case ACPI_SBS_CHARGER:
case ACPI_SBS_MANAGER:
case ACPI_SBS_BATTERY:
acpi_os_execute(OSL_GPE_HANDLER,
acpi_smbus_callback, hc);
default:;
}
mutex_unlock(&hc->lock); mutex_unlock(&hc->lock);
return 0; return 0;
} }

6
drivers/acpi/sbshc.h
View File

@ -16,6 +16,12 @@ enum acpi_smb_protocol {
static const u8 SMBUS_PEC = 0x80; static const u8 SMBUS_PEC = 0x80;
enum acpi_sbs_device_addr {
ACPI_SBS_CHARGER = 0x9,
ACPI_SBS_MANAGER = 0xa,
ACPI_SBS_BATTERY = 0xb,
};
typedef void (*smbus_alarm_callback)(void *context); typedef void (*smbus_alarm_callback)(void *context);
extern int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address, extern int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,