diff options
| author | H. Peter Anvin | 2008-06-24 23:03:48 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2008-07-05 08:25:40 +0200 |
| commit | 4b4f7280d7fd1feeff134c2cf2db32fd583b6c29 (patch) | |
| tree | f10e83d5f2708cc0045a177cc4cdd68a0ff11762 /drivers/acpi/sleep | |
| parent | b8a0b6ccf2ba2519ace65d782b41ee91bf3c3778 (diff) | |
x86 ACPI: normalize segment descriptor register on resume
Some Dell laptops enter resume with apparent garbage in the segment
descriptor registers (almost certainly the result of a botched
transition from protected to real mode.) The only way to clean that
up is to enter protected mode ourselves and clean out the descriptor
registers.
This fixes resume on Dell XPS M1210 and Dell D620.
Reference: http://bugzilla.kernel.org/show_bug.cgi?id=10927
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: pm list <linux-pm@lists.linux-foundation.org>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/acpi/sleep')
| -rw-r--r-- | drivers/acpi/sleep/main.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c index c3b0cd88d09f..495c63a3e0af 100644 --- a/drivers/acpi/sleep/main.c +++ b/drivers/acpi/sleep/main.c @@ -36,9 +36,8 @@ static int acpi_sleep_prepare(u32 acpi_state) if (!acpi_wakeup_address) { return -EFAULT; } - acpi_set_firmware_waking_vector((acpi_physical_address) - virt_to_phys((void *) - acpi_wakeup_address)); + acpi_set_firmware_waking_vector( + (acpi_physical_address)acpi_wakeup_address); } ACPI_FLUSH_CPU_CACHE(); |