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| author | Jiri Slaby <jirislaby@gmail.com> | 2009-02-15 22:46:45 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-02-22 03:58:18 +0100 |
| commit | 6defa2fe2019f3729933516fba5cfd75eecd07de (patch) | |
| tree | b83d864329067e9a8137b8cb4bcd5f75266885c5 | |
| parent | x86_64: acpi/wakeup_64 cleanup (diff) | |
| download | linux-6defa2fe2019f3729933516fba5cfd75eecd07de.tar.xz linux-6defa2fe2019f3729933516fba5cfd75eecd07de.zip | |
x86_64: Fix S3 fail path
As acpi_enter_sleep_state can fail, take this into account in
do_suspend_lowlevel and don't return to the do_suspend_lowlevel's
caller. This would break (currently) fpu status and preempt count.
Technically, this means use `call' instead of `jmp' and `jmp' to
the `resume_point' after the `call' (i.e. if
acpi_enter_sleep_state returns=fails). `resume_point' will handle
the restore of fpu and preempt count gracefully.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | arch/x86/kernel/acpi/wakeup_64.S | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S index b5dee6a0de3a..96258d9dc974 100644 --- a/arch/x86/kernel/acpi/wakeup_64.S +++ b/arch/x86/kernel/acpi/wakeup_64.S @@ -73,7 +73,9 @@ ENTRY(do_suspend_lowlevel) addq $8, %rsp movl $3, %edi xorl %eax, %eax - jmp acpi_enter_sleep_state + call acpi_enter_sleep_state + /* in case something went wrong, restore the machine status and go on */ + jmp resume_point .align 4 resume_point: |