https://bugzilla.kernel.org/show_bug.cgi?id=50521 Summary: nouveau_acpi call _DSM with wrong parameter Product: Drivers Version: 2.5 Kernel Version: 2.6.38 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx ReportedBy: alex.williamson@xxxxxxxxxx CC: alan@xxxxxxxxxxxxxxxxxxx, daniel@xxxxxxxx Regression: No Cloning for nouveau +++ This bug was initially created as a clone of Bug #32602 +++ Both drivers/gpu/drm/i915/intel_acpi.c and drivers/gpu/drm/nouveau/nouveau_acpi.c call _DSM methods with parameters of _DSM(Buffer, Integer, Integer, Integer). The ACPI spec defines the parameters to be _DSM(Buffer, Integer, Integer, Package). On a UL30VT, the AML preforms operations on Arg3 which are not valid for an Integer data type, resulting in ACPI faults. Excerpt of DSDT: Method (_DSM, 4, NotSerialized) { If (LEqual (Arg0, Buffer (0x10) { /* 0000 */ 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D, /* 0008 */ 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4 })) { Store (Zero, Local0) Store (ShiftLeft (DerefOf (Index (Arg3, 0x03)), 0x18), Local0) Add (ShiftLeft (DerefOf (Index (Arg3, 0x02)), 0x10), Local0, Local0) Add (ShiftLeft (DerefOf (Index (Arg3, One)), 0x08), Local0, Local0) Add (ShiftLeft (DerefOf (Index (Arg3, Zero)), Zero), Local0, Local0) ... The Index operation is only valid on a Buffer, String, or Package, which is perfectly reasonable given the definition of the _DSM call. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
