Hello On Tue, Nov 25, 2014 at 6:05 PM, Alan Stern <st...@rowland.harvard.edu> wrote: > On Tue, 25 Nov 2014, Ricardo Ribalda Delgado wrote: > >> Hello Alan >> >> Could you test if the parameter dma_chaining works on your board with >> the current kernel? >> >> #on the target >> modprobe net2280 use_dma_chaining=1 #(it it is already loaded, rmmod) >> dd if=/dev/zero of=/tmp/mem bs=256M count=1 >> modprobe g_mass_storage file=/tmp/mem >> >> #on the host >> #Check if /dev/sdX has apperared >> dd if=/dev/sdX of=/dev/null > > It doesn't even come close to working. The system grinds to a halt > when the UDC fails to send the third bulk-out packet. The first two > packets get sent okay.
Exactly the same that I am experiencing. I am preparing a patch that removes the option, does some dma cleanout and then add support for sg. I might ask you to test it in the future :) Thanks for your help! > > Alan Stern > -- Ricardo Ribalda -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
