On Mon, 7 Apr 2008 03:16:31 -0700, "Bryan Wu" <cooloney@xxxxxxxxxx> wrote: > Hi folks, > > Here are our trackers, I think following bugs are the same issue: > USB-IDE cable: > https://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_id=141&tracker_item_id=3789 > MicroSD card reader: > https://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_id=141&tracker_item_id=3790 > 30G iPod: > http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.25-rc8/2.6.25-rc8-mm1/2.6.25-rc8-mm1.bz2 > SD card reader: > https://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_id=141&tracker_item_id=3807 > > a) For the MODE_SENSE(6) SCSI command, these bug usb devices will > reply stall when host wait for 1st CSW > b) Linux host will clear halt of the endpoint. > c) Linux host will wait for the 2nd CSW, but no RX IRQ at all. Then > USB reset operation will be triggered by Linux host stack > when time out > d) The same bug usb devices is OK on Linux host PC, because they will > reply to 2nd CSW in the right way. > e) So I hacked the usb-storage driver code, the Linux host on Blackfin > will not wait for the 2nc CSW. Then this bug is gone. > > This is just a workaround for that, it should not be the right way. > Does anyone here meet this issue before, on Davinci or OMAP? > We always need a real fix, thanks a lot I've seen this already with n800/n810. It came up after a merge with mainline that changed usb subsystem a bit. Tony made musb driver work again after the merge but still some issues that should be addressed. If you wanna dig more on this... patches are welcome :-) > > -Bryan Wu > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Best Regards, Felipe Balbi http://felipebalbi.com me@xxxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
