Hi Matt, ... On Thu, Dec 17, 2009 at 04:07:55PM -0800, Matthew Dharm wrote: > On Thu, Dec 17, 2009 at 03:13:22PM -0800, Arthur Jones wrote: > > The Intel Value SSD has a bug where it will lock > > solid if it encounters a delay between the command > > and data phases of the usb bulk storage transactions. > > This bug is easily reproduced by adding a 2.5sec > > delay just before the comment labelled DATA STAGE > > in drivers/usb/storage/transport.c in > > usb_stor_Bulk_transport(). > > > > We can't really guarantee to not hit this bug, but > > if we decrease our nice level, we may be somewhat > > less likely to see this already rare issue surface. > > I have two issues with this: > > 1) I'm not clear on the side effects of changing our priority. We've had > issues in the past because block-storage devices are tied closely into the > memory management system, and I'd hate to see another issue like those crop > up because we're wagging our priority around. That said, I have no direct > knowledge of anything that would cause an issue... > > 2) All this patch does is cover up a pretty serious bug, without completely > covering it up. The end-user still winds up with an unreliable storage > device. With your patch, it may simply be a little less unreliable. Yeah, it sounds like you don't think that adding this code is worth a minor bump in reliability -- I can't really argue w/ that... > I think I would rather let people know that their device is unreliable, and > encourage them to get a firmware update from Intel. Actually, didn't Intel > just release a firmware update for these a few days ago? Thanks for having a look... I don't know anything about a f/w update, Intel has since sold off this business and AFAIK, no longer supports this device. If you have any links I would love to follow up on them. The model number on the device is Intel Z-U130. I would be very happy if this could be fixed in f/w. Arthur > > Matt > > -- > Matthew Dharm Home: mdharm-usb@xxxxxxxxxxxxxxxxxx > Maintainer, Linux USB Mass Storage Driver > > M: No, Windows doesn't have any nag screens. > C: Then what are those blue and white screens I get every day? > -- Mike and Cobb > User Friendly, 1/4/1999 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
