On Thu, Jan 20, 2011 at 10:55 AM, Lin Ming <ming.m.lin@xxxxxxxxx> wrote: > On Mon, 2011-01-17 at 14:51 +0800, Corentin Chary wrote: >> >> I got an acpi notify handler. The notify is triggered when I call WMBC(). >> >> In this notify handler, I must re-call WMBC (with some other arguments, it won't >> >> notify again this time). >> >> >> >> If I do that, I'll get: >> >> [ Â176.920391] ACPI Error (dswload-0802): [_T_0] Namespace lookup >> >> failure, AE_ALREADY_EXISTS >> >> [ Â176.920416] ACPI Exception: AE_ALREADY_EXISTS, During name >> >> lookup/catalog (20100428/psloop-231) >> >> [ Â176.920439] ACPI Error (psparse-0537): Method parse/execution >> >> failed [\AMW0.WMBC] (Node f7023b88), AE_ALREADY_EXISTS >> >> [ Â176.920469] ACPI: Marking method WMBC as Serialized because of >> >> AE_ALREADY_EXISTS error >> > >> > Could you attach the acpidump output? >> >> Here it is, and here is the patch I did (I used the workqueue solution >> in this one): >> >> http://git.iksaif.net/?p=acpi4asus.git;a=blobdiff;f=drivers/platform/x86/eeepc-wmi.c;h=725239860bad8d97dabf8b3db4086d6df4b7820b;hp=0d8217d1478028071859ba1a503ba226b3cb33a0;hb=1eac4d6a6fb632314a464e7d52e1dcb1e4780931;hpb=5c5d1a036bb7d38153c6d2102767ef51e5d94ce3 >> >> (check eeepc_rfkill_notify, it's triggered when the wlan rfkill is >> blocked: WMBC is called to disable the wlan card, it send a >> notification, the handler is called, the handler want to check the >> wlan card status, it calls WMBC again). >> Thanks; >> > > Sorry for late reply. > > WMBC is not an ACPI spec defined method (which always start with "_", > _ADR, _DSW etc), the driver should only call ACPI spec defined method. > What does this method do? > > And, I don't see any call to WMBC in eeepc-wmi.c or above patch. It's a wmi driver, so it calls wmi_evaluate_method, wich internally will call \AMW0.WMBC for this GUID. Sorry for the confusion. I finally found a solut^W^W workaround: http://git.iksaif.net/?p=acpi4asus.git;a=commitdiff;h=aa8ff8f23b2f99da9371da9154d3e523b964f054;hp=d13f17d9657d7161884e289cc2ac6efb414a6ff9 But it would probably be cleaner to tell ACPI that we want to serialize access to this method, and let acpica mechanism do the job for us. Thanks, -- Corentin Chary http://xf.iksaif.net -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
