Hi, On Mon, Aug 31, 2015 at 11:41:59AM -0500, Felipe Balbi wrote: > On Mon, Aug 31, 2015 at 03:11:58PM +0200, Yegor Yefremov wrote: > > Hi Felipe, > > > > On Fri, Aug 7, 2015 at 12:57 PM, Yegor Yefremov > > <yegorslists@xxxxxxxxxxxxxx> wrote: > > > On Fri, Aug 7, 2015 at 12:16 PM, Yegor Yefremov > > > <yegorslists@xxxxxxxxxxxxxx> wrote: > > >> On Thu, Aug 6, 2015 at 4:21 PM, Felipe Balbi <balbi@xxxxxx> wrote: > > >>> HI, > > >>> > > >>> On Thu, Aug 06, 2015 at 09:40:26AM +0200, Yegor Yefremov wrote: > > >>>> I performed a stress test with several FT4232H chips connected to a > > >>> > > >>> how many ? > > >> > > >> # lsusb -t > > >> /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=musb-hdrc/1p, 480M > > >> /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=musb-hdrc/1p, 480M > > >> |__ Port 1: Dev 2, If 0, Class=, Driver=hub/4p, 480M > > >> |__ Port 1: Dev 3, If 0, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 1: Dev 3, If 1, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 1: Dev 3, If 2, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 1: Dev 3, If 3, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 2: Dev 4, If 0, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 2: Dev 4, If 1, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 2: Dev 4, If 2, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 2: Dev 4, If 3, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 3: Dev 5, If 0, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 3: Dev 5, If 1, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 3: Dev 5, If 2, Class=, Driver=ftdi_sio, 480M > > >> |__ Port 3: Dev 5, If 3, Class=, Driver=ftdi_sio, 480M > > >> > > >> 3 chips a 4-ports are attached. > > > > > > Warnings appear on another device (without internal hub) with only one > > > FT4232H too: > > > > > > # lsusb -t > > > /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=musb-hdrc/1p, 480M > > > |__ Port 1: Dev 2, If 0, Class=, Driver=ftdi_sio, 480M > > > |__ Port 1: Dev 2, If 1, Class=, Driver=ftdi_sio, 480M > > > |__ Port 1: Dev 2, If 2, Class=, Driver=ftdi_sio, 480M > > > |__ Port 1: Dev 2, If 3, Class=, Driver=ftdi_sio, 480M > > > > > >>>> hub, that is attached to one of the musb ports. So far the test was > > >>>> successful for several hours. But I've seen following warnings: > > >>>> > > >>>> musb_host_rx 1973: Rx interrupt with no errors or packet! > > >>>> musb_ep_program 931: broken !rx_reinit, ep5 csr 0203 > > >>>> musb_host_rx 1973: Rx interrupt with no errors or packet! > > >>>> musb_host_rx 1973: Rx interrupt with no errors or packet! > > >>>> musb_host_rx 1973: Rx interrupt with no errors or packet! > > >>>> musb_host_rx 1973: Rx interrupt with no errors or packet! > > >>>> musb_ep_program 931: broken !rx_reinit, ep5 csr 0003 > > >>>> musb_host_rx 1973: Rx interrupt with no errors or packet! > > >>>> musb_ep_program 931: broken !rx_reinit, ep7 csr 0003 > > >>>> > > >>>> Is this expected behavior? > > >>> > > >>> no, that shouldn't happen, but it does and, apparently, in more than one > > >>> implementation. Wondering if you're running into endpoint limitation due > > >>> to MUSB's poor transfer scheduling for non-bulk endpoints. > > >>> > > >>> -- > > >>> balbi > > > > Now I have another trouble with msub and FTDI FT4232H chip. If I start > > something like this on all 4 ports at 115200b/s, then pull USB cable > > and the system freezes: > > > > cat /dev/urandom > /dev/ttyUSB0 > > ... > > cat /dev/urandom > /dev/ttyUSB3 > > > > I see these messages: > > > > ftdi_sio ttyUSB3: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > ftdi_sio ttyUSB0: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > ftdi_sio ttyUSB1: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > ftdi_sio ttyUSB2: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > ftdi_sio ttyUSB3: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > ftdi_sio ttyUSB0: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > ftdi_sio ttyUSB1: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > ftdi_sio ttyUSB2: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > ftdi_sio ttyUSB3: usb_serial_generic_write_bulk_callback - nonzero urb > > status: -110 > > > > After them system reboots as my watchdog time expires. > > > > Kernel 4.2.0-rc5 > > > > Older FTDI chips like FT2232 have no problems. Somehow is musb really > > allergic to FTDI and vice versa :-( > > those are just messages of URB time out. They should be expected. No > idea why you're getting a reboot though. I'll see if I can reproduce. okay, reproduced. Seems to be a race somewhere. some printks() made it go away :-) I'll have a look. -- balbi
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