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| author | Bob Moore <robert.moore@intel.com> | 2015-12-29 08:56:14 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-01-01 05:47:35 +0300 |
| commit | c6c6069cad37952da71d2a24eb6ee0a87074b35c (patch) | |
| tree | 96fa2a7a1f0f5a16afb985d226038278408a02a0 | |
| parent | 07cb390f43e7fd9daceb6a1e223a82c832f5f9ab (diff) | |
| download | linux-c6c6069cad37952da71d2a24eb6ee0a87074b35c.tar.xz | |
ACPICA: Add comment explaining _SUB removal
ACPICA commit 81a89968f83bfc3b1d0f0f80f2da08ea69646053
Adds a lengthy comment to acpi_get_object_info explaining the removal
of _SUB and why no complex methods can be added ever to this
interface.
Link: https://github.com/acpica/acpica/commit/81a89968
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/acpi/acpica/nsxfname.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c index 0e4e6b7983cc..669e0f1b0967 100644 --- a/drivers/acpi/acpica/nsxfname.c +++ b/drivers/acpi/acpica/nsxfname.c @@ -267,6 +267,13 @@ static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest, * * Note: Allocates the return buffer, must be freed by the caller. * + * Note: This interface is intended to be used during the initial device + * discovery namespace traversal. Therefore, no complex methods can be + * executed, especially those that access operation regions. Therefore, do + * not add any additional methods that could cause problems in this area. + * this was the fate of the _SUB method which was found to cause such + * problems and was removed (11/2015). + * ******************************************************************************/ acpi_status |