On Sun, Sep 20, 2009 at 8:10 AM, Dan Williams <dcbw@xxxxxxxxxx> wrote: > On Wed, 2009-09-16 at 13:24 -0400, John Goyette wrote: >> Hello all, >> >> >> >> I am looking for some advice on a Libertas related issue. I am having a problem with a recent feature we added to our embedded system that continuously monitors wifi statistics, i.e., signal strength. We are using a Blackfin platform with a Marvell 8686 device in the G-SPI configuration. Our kernel is based on a 2.6.28.6 release. > > Any chance you can grab the driver from 2.6.31 and rebuild it for your > kernel? There are a few fixes from earlier this summer for GSPI and > Power Saving mode from Andrey Yurovsky that may fix your issue. I'm > thinking specifically of b3781c74373489fa325ce64efdf72f6c8567b783 and a > few of the other PS cleanups from July. I believe that John has the bug fixes in question -- John, can you summarize your setup (which compat-wireless snapshot, etc)? >> The problem occurs after pressing Ctrl-C to terminate a user space program that is polling the wireless stats in a loop. A number of libertas error messages appear indicating a failure to download command 0x0000. I am pretty sure there is no command 0x0000, so I do not know how it got queued. Here is a sample of the error messages from dmesg: >> >> >> >> libertas: command 0x0000 timed out >> libertas: requeueing command 0x0000 due to timeout (#1) >> libertas: if_spi_host_to_card: invalid size requested: 0 >> libertas: DNLD_CMD: hw_host_to_card failed: -22 >> libertas: command 0x0000 timed out >> libertas: requeueing command 0x0000 due to timeout (0000002 <http://schicksw/mantis/view.php?id=2> ) >> libertas: if_spi_host_to_card: invalid size requested: 0 >> libertas: DNLD_CMD: hw_host_to_card failed: -22 >> libertas: command 0x0000 timed out >> libertas: requeueing command 0x0000 due to timeout (0000003 <http://schicksw/mantis/view.php?id=3> ) >> libertas: if_spi_host_to_card: invalid size requested: 0 >> libertas: DNLD_CMD: hw_host_to_card failed: -22 >> libertas: command 0x0000 timed out >> libertas: Excessive timeouts submitting command 0x0000 >> >> >> >> >> >> This can be reproduced by enabling IEEE Power Savings mode and flooding the card with wireless stats requests by running something like the following from a terminal: >> >> while true; do iwconfig eth1;done >> >> >> >> Let this run for 30-60 secs, and then press Ctrl-C. With IEEE power savings off, it may take several minutes, but does eventually give the same problem. I have downloaded the compat-wireless-2.6.30 release and was able to cross-compile it for our kernel. It helped a little in that it seemed to take longer before the error messaged occurred after pressing ctrl-c, but it did not completely resolve the problem. >> >> >> >> Has anyone seen something similar? Are there any more recent patches that may address this issue? >> >> >> >> Thanks. >> >> >> >> -John Goyette >> >> Schick Technologies, Inc. >> >> >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > To unsubscribe from this list: send the line "unsubscribe linux-wireless" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
