On Tue, 3 Apr 2012, angelo fontana wrote: > Hi, > I have an embedded board with microprocessor MPC8270 and a ISP1562 BE as USB controller; kernel is based on linux-2.6.25.14 (ehci and ohci enabled). > > When I plug an USB 1.1 stick (or USB 2.0 through an USB 1.1 hub), I cannot mount the disk. > > I've enabled all the verbose debug of USB, usb_storage and SCSI in the kernel. > > The first part of 'dmesg' show the behavior of the stick insertion > Few seconds after the command 'MODE_SENSE', USB stick is reset and the USB protocol restart. > After 2 minutes, 'dmesg' show a call trace and then USB protocol restart. > I've put two snapshots of 'dmesg' at the end of this message. > > In most cases (90%), USB 2.0 sticks work properly but when a stick is downgraded (noisy USB cable?), I see the same behavior of USB 1.1 > > I don't understand if it's a software bug (kernel, drivers, ???) or an hardware issue. > Can someone help me? > > Thanks and Best Regards > Angelo Fontana > usb-storage: queuecommand called > usb-storage: *** thread awakened. > usb-storage: Command MODE_SENSE (6 bytes) > usb-storage: 1a 00 3f 00 c0 00 > usb-storage: Bulk Command S 0x43425355 T 0x4 L 192 F 128 Trg 0 LUN 0 CL 6 > usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes > usb-storage: Status code 0; transferred 31/31 > usb-storage: -- transfer complete > usb-storage: Bulk command transfer result=0 > usb-storage: usb_stor_bulk_transfer_sglist: xfer 192 bytes, 1 entries > ohci_hcd 0000:00:0c.1: urb dfed0940 path 1 ep1in 91120000 cc 9 --> status -121 > usb-storage: Status code -121; transferred 4/192 > usb-storage: -- short read transfer > usb-storage: Bulk data transfer result 0x1 > usb-storage: Attempting to get CSW... > usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes > usb-storage: command_abort called > usb-storage: usb_stor_stop_transport called > usb-storage: -- cancelling URB > usb-storage: Status code -104; transferred 0/13 > usb-storage: -- transfer cancelled > usb-storage: Bulk status result = 4 > usb-storage: -- command was aborted This is probably a bug in the flash drive. Have you tried plugging it into a regular PC running an up-to-date version of Linux? Alan Stern -- 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
