lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86, acpi, tboot: Have a ACPI os prepare sleep instead of calling tboot_sleep.

Browse Source 
The ACPI suspend path makes a call to tboot_sleep right before
it writes the PM1A, PM1B values. We replace the direct call to
tboot via an registration callback similar to __acpi_register_gsi.

CC: Len Brown <len.brown@intel.com>
Acked-by: Joseph Cihula <joseph.cihula@intel.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
[v1: Added __attribute__ ((unused))]
[v2: Introduced a wrapper instead of changing tboot_sleep return values]
[v3: Added return value AE_CTRL_SKIP for acpi_os_sleep_prepare]
Signed-off-by: Tang Liang <liang.tang@oracle.com>
[v1: Fix compile issues on IA64 and PPC64]
[v2: Fix where __acpi_os_prepare_sleep==NULL and did not go in sleep properly]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Tang Liang
2011-12-09 10:05:54 +08:00
committed by Konrad Rzeszutek Wilk
parent 805a6af8db
commit 09f98a825a
6 changed files with 50 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/acpi/osl.c
View File

@ -76,6 +76,9 @@ EXPORT_SYMBOL(acpi_in_debugger);
extern char line_buf[80];
#endif /*ENABLE_DEBUGGER */
static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
u32 pm1b_ctrl);
static acpi_osd_handler acpi_irq_handler;
static void *acpi_irq_context;
static struct workqueue_struct *kacpid_wq;
@ -1659,3 +1662,24 @@ acpi_status acpi_os_terminate(void)
return AE_OK;
}
acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
u32 pm1b_control)
{
int rc = 0;
if (__acpi_os_prepare_sleep)
rc = __acpi_os_prepare_sleep(sleep_state,
pm1a_control, pm1b_control);
if (rc < 0)
return AE_ERROR;
else if (rc > 0)
return AE_CTRL_SKIP;
return AE_OK;
}
void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
u32 pm1a_ctrl, u32 pm1b_ctrl))
{
__acpi_os_prepare_sleep = func;
}