On Mon, Jun 06, 2011 at 09:56:05AM +0300, Tanya Brokhman wrote: > > > [ 65.694680] xhci_hcd 0000:01:00.0: Wrote link toggle flag to > > segment ffff880122acc460 (virtual), 0xc5021000 (DMA) > > > [ 65.694683] xhci_hcd 0000:01:00.0: WARN no SS endpoint bMaxBurst > > > > Do you have a SuperSpeed Endpoint Companion descriptor for all your > > endpoints? Because this message seems to indicate you don't. Can you > > send me the lsusb -vvv for your device? > > Lsusb log is attached. We do have SS Endpoint Companion descriptor, I think > the warning here is because the bMaxBurst field of the Endpoint Companion > descriptor is 0. > > > > [ 108.742142] xhci_hcd 0000:01:00.0: Wrote link toggle flag to > > segment ffff880037bde560 (virtual), 0x37a93400 (DMA) > > > [ 108.742146] xhci_hcd 0000:01:00.0: WARN no SS endpoint bMaxBurst > > > > More issues with the SuperSpeed Endpoint Companion descriptors here. > > Is it a problem that we report that bMaxBurst is 0? Looking at the spec, no, there shouldn't be a problem. I should remove that warning, I suppose. I guess I've just never seen a USB 3.0 device that couldn't burst more than one packet. > Bus 010 Device 003: ID 0525:a4a5 Netchip Technology, Inc. Linux-USB File Storage Gadget > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 3.00 > bDeviceClass 0 (Defined at Interface level) > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 9 > idVendor 0x0525 Netchip Technology, Inc. > idProduct 0xa4a5 Linux-USB File Storage Gadget > bcdDevice 0.00 > iManufacturer 2 Linux 2.6.39+ with pcd > iProduct 3 Mass Storage Gadget > iSerial 0 > bNumConfigurations 2 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 44 > bNumInterfaces 1 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0xc0 > Self Powered > MaxPower 2mA > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 2 > bInterfaceClass 8 Mass Storage > bInterfaceSubClass 6 SCSI > bInterfaceProtocol 80 Bulk (Zip) > iInterface 1 Mass Storage > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0400 1x 1024 bytes > bInterval 0 > ** UNRECOGNIZED: 06 30 00 00 00 00 Oh, what version of lsusb are you using? The latest version of usbutils has support to display the SuperSpeed Endpoint Companion descriptor. The git repo is here, if you're interested: git://kernel.org/pub/scm/linux/kernel/git/gregkh/usbutils.git But yes, it looks like you do have the SuperSpeed Endpoint Companion descriptor. Sarah Sharp -- 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
