2010/10/11 Grazvydas Ignotas <notasas@xxxxxxxxx>: > On Mon, Oct 11, 2010 at 1:53 PM, Ming Lei <tom.leiming@xxxxxxxxx> wrote: >> 2010/10/11 Grazvydas Ignotas <notasas@xxxxxxxxx>: >>>>> which effectively disables DMA due to a bug in it, so it's probably >>>>> DMA problems on my board. Here is my log: >>>> >>>> Yes, your issue may be related with ep1out Rx DMA, but I am not sure >>>> since the very important message between timestamp 39.256011 and >>>> 85.210693 is not provided by you, why not post all messages? >>> >>> I did not remove any messages (only added annotation), there was >>> simply no output. I suppose something wrong happens after >> >> If so, no any rx interrupt for ep1out comes after request is queued since >> musb_g_rx is not called from your log. >> >> There is two possibilities: >> >> - usb host does not send any packets to ep1out >> >> - packets has been sent from usb host to musb gadget, but omap3 >> is not notified by musb rx interrupt, or there is no musb rx >> interrupt. >> >> You can trace usb traffic in usb host to see if there are packets sent >> to ep1out, usbmon can do it for you, please see Documentation/usb/usbmon.txt >> for reference. If no packets are traced for ep1out, your problem is nothing >> to do with musb, and may should be related with usb host driver(usbnet?). > > ok here are usbmon logs, taken using same scenario: > http://notaz.gp2x.de/misc/pnd/linux_next_20101008_usbmon > > and here is usbmon log when musb runs in PIO mode and ping works: > http://notaz.gp2x.de/misc/pnd/linux_next_20101008_usbmon_nodma > > So maybe it's ep2in issue after all? > Yes, it is really with ep2in, and musb ep2in always return more data to host so cause overflow in host. I see what triggered your issue, please try the patch in the link below: http://marc.info/?l=linux-usb&m=128576496614332&w=2 -- Lei Ming -- 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
