xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'bugzilla-13041' into release

Browse Source
This commit is contained in:
Len Brown
2009-04-24 01:35:24 -04:00
parent 09041daeea 96f15efcea
commit ac0849fb6c
2 changed files with 53 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/acpi/sleep.c
View File

@@ -713,6 +713,32 @@ static void acpi_power_off(void)
acpi_enter_sleep_state(ACPI_STATE_S5);
}
/*
* ACPI 2.0 created the optional _GTS and _BFS,
* but industry adoption has been neither rapid nor broad.
*
* Linux gets into trouble when it executes poorly validated
* paths through the BIOS, so disable _GTS and _BFS by default,
* but do speak up and offer the option to enable them.
*/
void __init acpi_gts_bfs_check(void)
{
acpi_handle dummy;
if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy)))
{
printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n");
printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, "
"please notify linux-acpi@vger.kernel.org\n");
}
if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy)))
{
printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n");
printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, "
"please notify linux-acpi@vger.kernel.org\n");
}
}
int __init acpi_sleep_init(void)
{
acpi_status status;
@@ -771,5 +797,6 @@ int __init acpi_sleep_init(void)
* object can also be evaluated when the system enters S5.
*/
register_reboot_notifier(&tts_notifier);
acpi_gts_bfs_check();
return 0;
}