diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-11-20 09:03:38 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-11-20 09:03:38 +0100 |
commit | 90accd6fabf9b2fa2705945a4c601877a75d43bf (patch) | |
tree | d393cb54f0228b1313139e4e14adf4f5cf236b59 /drivers/acpi/reboot.c | |
parent | b43d196c4d3fe46d6dda7c987c47792612b80b1b (diff) | |
parent | ee2f6cc7f9ea2542ad46070ed62ba7aa04d08871 (diff) |
Merge branch 'linus' into x86/memory-corruption-check
Diffstat (limited to 'drivers/acpi/reboot.c')
-rw-r--r-- | drivers/acpi/reboot.c | 25 |
1 files changed, 3 insertions, 22 deletions
diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c index 755baf2ca70..a6b662c00b6 100644 --- a/drivers/acpi/reboot.c +++ b/drivers/acpi/reboot.c @@ -15,28 +15,9 @@ void acpi_reboot(void) rr = &acpi_gbl_FADT.reset_register; - /* - * Is the ACPI reset register supported? - * - * According to ACPI 3.0, FADT.flags.RESET_REG_SUP indicates - * whether the ACPI reset mechanism is supported. - * - * However, some boxes have this bit clear, yet a valid - * ACPI_RESET_REG & RESET_VALUE, and ACPI reboot is the only - * mechanism that works for them after S3. - * - * This suggests that other operating systems may not be checking - * the RESET_REG_SUP bit, and are using other means to decide - * whether to use the ACPI reboot mechanism or not. - * - * So when acpi reboot is requested, - * only the reset_register is checked. If the following - * conditions are met, it indicates that the reset register is supported. - * a. reset_register is not zero - * b. the access width is eight - * c. the bit_offset is zero - */ - if (!(rr->address) || rr->bit_width != 8 || rr->bit_offset != 0) + /* Is the reset register supported? */ + if (!(acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) || + rr->bit_width != 8 || rr->bit_offset != 0) return; reset_value = acpi_gbl_FADT.reset_value; |