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. Dan > > > 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
