Hi,
I just recently moved an internal USB card reader from an ehci machine
to an xhci machine, and dmesg is filled with this message over and
over again:
[ 1596.047684] usb 1-8: reset high-speed USB device number 4 using xhci_hcd
[ 1596.090902] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
with disabled ep ffff88041b06d700
[ 1596.090904] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
with disabled ep ffff88041b06d740
This did not happen on the ehci machine. Oddly, the card reader still
works, but it just keeps printing that message in the log.
-Joe Yasi
dmesg:
[ 2.121631] usb 1-8: new high-speed USB device number 4 using xhci_hcd
[ 2.479333] Switched to clocksource tsc
[ 2.719236] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 3.034283] usb 1-8: New USB device found, idVendor=054c, idProduct=01bd
[ 3.034305] usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3.034326] usb 1-8: Product: USB 2.0 MultiCard R/W
[ 3.034341] usb 1-8: Manufacturer: Sony
[ 3.034355] usb 1-8: SerialNumber: 2B1060000FAD
[ 3.036450] usb-storage 1-8:1.0: USB Mass Storage device detected
[ 3.036499] scsi8 : usb-storage 1-8:1.0
[ 3.036548] usbcore: registered new interface driver usb-storage
-- snip --
[ 9.022011] usb 1-8: reset high-speed USB device number 4 using xhci_hcd
[ 9.065195] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
with disabled ep ffff88041b7e4480
[ 9.065197] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
with disabled ep ffff88041b7e44c0
--
[ 11.392706] usb 1-8: reset high-speed USB device number 4 using xhci_hcd
[ 11.435895] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
with disabled ep ffff88041b7e4480
[ 11.435899] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
with disabled ep ffff88041b7e44c0
--
[ 16.250041] usb 1-8: reset high-speed USB device number 4 using xhci_hcd
[ 16.293239] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
with disabled ep ffff88041b7e4480
[ 16.293241] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called
with disabled ep ffff88041b7e44c0
--
lsusb -vv -s 1:4
Bus 001 Device 004: ID 054c:01bd Sony Corp. MRW62E Multi-Card Reader/Writer
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x054c Sony Corp.
idProduct 0x01bd MRW62E Multi-Card Reader/Writer
bcdDevice 51.95
iManufacturer 1 Sony
iProduct 2 USB 2.0 MultiCard R/W
iSerial 3 2B1060000FAD
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4 CARD READER
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 5 Bulk-In, Bulk-Out, Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 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 0x0200 1x 512 bytes
bInterval 0
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
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