just another measurement point > Stephen Warren wrote at Thursday: > > Here are the results I found: > > Harmony: > Tegra USB3 -> SMSC9514 hub: NOT affected > (Unplugging LAN cable, or disabling SMSC9514 LAN driver doesn't change > this) > > Seaboard (springbank; clamshell): > Tegra USB1 -> no hub: Affected > > Seaboard (seaboard non-clamshell): > Tegra USB1 -> no hub: Affected > Tegra USB3 -> no hub: Affected > > TrimSlice: > Tegra USB3 -> unknown hub: Affected PAZ00: ULPI -> SMCS 2512: Affected Tegra USB3 -> SMSC 2514: Affected The patch also cures high latencies/packet drops on wifi connected to ULPI via the 2512 hub. The pen drive was connected to USB3/2514. > This implies there's something different about Harmony. > > Is the USB hub a clue? Seaboard doesn't have one, and although I don't > know what model TrimSlice uses, I assume it's different since I know > TrimSlice's Ethernet is not the same as Harmony's. > > I don't see anything in board-harmony.c vs. board-seaboard.c that'd affect > anything USB-related. > > Perhaps there's some kind of bootloader or BCT difference. However, my > Harmony and both Seaboards both use (a very old) U-Boot and BCT from > ChromeOS, so I don't imagine there's actually much difference there. -- 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
