On Friday 20 July 2012 13:37:37 Stefan Herbrechtsmeier wrote: > Am 20.07.2012 13:26, schrieb Benoît Thébaudeau: > > + int xfr_bytes = min(left_length, > > + (QT_BUFFER_CNT * 4096 - > > + ((uint32_t)buf_ptr & 4095)) & > > + ~4095); > Why you align the length to 4096?
It's to guarantee that each transfer length is a multiple of the max packet length. Otherwise, early short packets are issued, which breaks the transfer and results in time-out error messages. Regards, Benoît _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
