Date: Wed, 30 Jan 2002 01:13:51 -0700 (MST) From: "M. Warner Losh" <imp@village.org> To: brooks@one-eyed-alien.net Cc: eliedtke@apogeetelecom.com, freebsd-stable@FreeBSD.ORG Subject: Re: Another Linksys WDT11 problem Message-ID: <20020130.011351.13523788.imp@village.org> In-Reply-To: <20020129150921.A7477@Odin.AC.HMC.Edu> References: <20020129025206.GC31653@apogeetelecom.com> <20020129150921.A7477@Odin.AC.HMC.Edu>
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In message: <20020129150921.A7477@Odin.AC.HMC.Edu>
Brooks Davis <brooks@one-eyed-alien.net> writes:
: On Mon, Jan 28, 2002 at 08:52:06PM -0600, Eric Liedtke wrote:
: > Ok, from my last mail I got the card working fine. So it was time to
: > tranfer it to a 3rd machine, my home router, as it's final resting place
: > and I have run into a new problem....I am getting a error message of
: >
: > wi0: mac read failed 5
: >
: > I poked around in the code a little bit, but couldn't come up with
: > anything of use. I am not sure how to go about troubleshooting this from
: > here, so any advice would be great. Thanks
:
: Ok, this is a bit of a shot in the dark, but what the heck. If you look
: for that error message in the driver, you'll find this comment:
:
: /*
: * Read the station address.
: * And do it twice. I've seen PRISM-based cards that return
: * an error when trying to read it the first time, which causes
: * the probe to fail.
: */
:
: My guess is that in some circumstances this hack isn't enough. The
: first thing to try would be stuffing a delay in between the two reads
: like so:
:
: wi_read_record(sc, (struct wi_ltv_gen *)&mac);
: ---> DELAY(50);
: if ((error = wi_read_record(sc, (struct wi_ltv_gen *)&mac)) != 0) {
: device_printf(dev, "mac read failed %d\n", error);
: wi_free(dev);
: return (error);
: }
:
: Try playing with the delay value a bit if that doesn't work.
Actaully, it should loop a few times reading it with a small delay
between each time. But this code seems very fragile. somethine else
in the system changes and it goes from working to non working.
Warner
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