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SubjectRe: [USB spamming log] with 3.16-rc (git) my pl2303 is spaming my logs
Date
Hi,

The kernel in question is running on a i7 with a pi connected via to the i6 via the pl2303 to view the pi's console.

The kernel on the i7 is at level:

commit 77c4cf17ae867ba93233b3832bda3de7adaae326
Merge: 88b5a85 133d452
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri Jul 4 09:37:43 2014 -0700

There is one extra patch applied to fix a problem with the boot stalling
see the patch from Chris Wilson in the thread: [PATCH 5/5] drm/i915: Kick out vga console

Here is a lsusb -v

Bus 001 Device 011: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x067b Prolific Technology, Inc.
idProduct 0x2303 PL2303 Serial Port
bcdDevice 3.00
iManufacturer 1 Prolific Technology Inc.
iProduct 2 USB-Serial Controller
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 39
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)

Thanks
Ed

On Saturday 05 July 2014 11:02:06 Greg KH wrote:
> On Sat, Jul 05, 2014 at 10:55:57AM -0400, Ed Tomlinson wrote:
> > Hi
> >
> > I have a raspberry PI sending its console to my box via a pl2303
>
> What exact pl2303 is this? Can you provide the output from 'lsusb'?
>
> > [ 5.184385] usbserial: USB Serial support registered for pl2303
> > [ 5.184398] pl2303 1-2.6:1.0: pl2303 converter detected
> > [ 5.185353] usb 1-2.6: pl2303 converter now attached to ttyUSB0
> >
> > and with the latest fixes from git on 3.16 its now started spamming my logs with:
> >
> > [55507.155354] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
> > [55510.736558] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
> > [55517.238586] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
> > [55521.099938] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
> > [55521.778520] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
> > [55523.229808] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
> > [55523.229846] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
> > [55525.074519] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
> > [55527.270207] pl2303 ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71
>
> That's saying there was one of the following errors in this device:
> a) bitstuff error
> b) no response packet received within the prescribed bus turn-around
> time
> c) unknown USB error
>
> All of which point to either a problem in the USB host controller, or
> the usb device itself.
>
> Is this an "unpatched" 3.16-rc kernel running on the rpi? If so, odds
> are it's a host controller issue...
>
> thanks,
>
> greg k-h
>



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