diff options
Diffstat (limited to 'drivers/acpi/hardware/hwsleep.c')
| -rw-r--r-- | drivers/acpi/hardware/hwsleep.c | 44 |
1 files changed, 18 insertions, 26 deletions
diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c index dba3cfbe8cba..25dccdf179b9 100644 --- a/drivers/acpi/hardware/hwsleep.c +++ b/drivers/acpi/hardware/hwsleep.c @@ -78,19 +78,17 @@ acpi_set_firmware_waking_vector(acpi_physical_address physical_address) return_ACPI_STATUS(status); } - /* Set the vector */ + /* + * According to the ACPI specification 2.0c and later, the 64-bit + * waking vector should be cleared and the 32-bit waking vector should + * be used, unless we want the wake-up code to be called by the BIOS in + * Protected Mode. Some systems (for example HP dv5-1004nr) are known + * to fail to resume if the 64-bit vector is used. + */ + if (facs->version >= 1) + facs->xfirmware_waking_vector = 0; - if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) { - /* - * ACPI 1.0 FACS or short table or optional X_ field is zero - */ - facs->firmware_waking_vector = (u32) physical_address; - } else { - /* - * ACPI 2.0 FACS with valid X_ field - */ - facs->xfirmware_waking_vector = physical_address; - } + facs->firmware_waking_vector = (u32)physical_address; return_ACPI_STATUS(AE_OK); } @@ -134,20 +132,7 @@ acpi_get_firmware_waking_vector(acpi_physical_address * physical_address) } /* Get the vector */ - - if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) { - /* - * ACPI 1.0 FACS or short table or optional X_ field is zero - */ - *physical_address = - (acpi_physical_address) facs->firmware_waking_vector; - } else { - /* - * ACPI 2.0 FACS with valid X_ field - */ - *physical_address = - (acpi_physical_address) facs->xfirmware_waking_vector; - } + *physical_address = (acpi_physical_address)facs->firmware_waking_vector; return_ACPI_STATUS(AE_OK); } @@ -627,6 +612,13 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state) } /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ + /* + * Some BIOSes assume that WAK_STS will be cleared on resume and use + * it to determine whether the system is rebooting or resuming. Clear + * it for compatibility. + */ + acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); + acpi_gbl_system_awake_and_running = TRUE; /* Enable power button */ |