Hi,
I'm getting
xhci_hcd 0000:00:14.0: WARN Event TRB for slot 6 ep 4 with no TDs queued?
on each interaction with my built-in CCID smartcard reader (Celsius
H730). The device is working fine otherwise, just the log fills up.
What's the reason? What can be done about it?
Find lsusb -v of the reader below.
Jan
---
Bus 001 Device 006: ID 0b97:7772 O2 Micro, Inc. OZ776 CCID Smartcard Reader
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0b97 O2 Micro, Inc.
idProduct 0x7772 OZ776 CCID Smartcard Reader
bcdDevice 1.10
iManufacturer 1 O2
iProduct 2 O2Micro CCID SC Reader
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 93
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 11 Chip/SmartCard
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 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 0x82 EP 2 IN
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 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0003 1x 3 bytes
bInterval 255
ChipCard Interface Descriptor:
bLength 54
bDescriptorType 33
bcdCCID 1.00
nMaxSlotIndex 0
bVoltageSupport 7 5.0V 3.0V 1.8V
dwProtocols 3 T=0 T=1
dwDefaultClock 4000
dwMaxiumumClock 4000
bNumClockSupported 0
dwDataRate 9600 bps
dwMaxDataRate 307200 bps
bNumDataRatesSupp. 0
dwMaxIFSD 254
dwSyncProtocols 00000000
dwMechanical 00000000
dwFeatures 00000030
Auto clock change
Auto baud rate change
dwMaxCCIDMsgLen 271
bClassGetResponse 00
bClassEnvelope 00
wlcdLayout none
bPINSupport 0
bMaxCCIDBusySlots 1
Device Status: 0x0001
Self Powered
Attachment:
signature.asc
Description: OpenPGP digital signature
