On Fri, Aug 22, 2014 at 04:32:10PM +0530, Kishon Vijay Abraham I wrote: > Hi, > > On Tuesday 19 August 2014 09:57 PM, Felipe Balbi wrote: > > On Tue, Aug 19, 2014 at 09:45:11PM +0530, Kishon Vijay Abraham I wrote: > >> Hi, > >> > >> On Monday 18 August 2014 08:11 PM, Felipe Balbi wrote: > >>> On Mon, Aug 18, 2014 at 07:58:35PM +0530, Kishon Vijay Abraham I wrote: > >>>> Bounce buffer is used for transferring requests which is not maxpacket > >>>> aligned. In the case of DFU the requests can be upto 4096 bytes. > >>>> > >>>> While the actual fix for this should be using two chained TRBs to handle > >>>> the transfer, this can be used as a temporary fix. > >>> > >>> Did you manage to trigger this fault ? Was the size larger than 512 ? > >> > >> yeah.. transferring any kernel image resulted in a size larger than 512. > > > > but it's also larger than 4KiB :-) > > Yeah. But the DFU specifies the maximum transfer size in wTransferSize (DFU > function descriptor) to the host which is 4096 bytes (DFU_USB_BUFSIZ). > > So the max size will be only 4KB.
ah, ok. Thanks for that detail. -- balbi
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