Greetings, I've got a OMAP3530 based board on which I'm having some trouble with HS USB transfers. I plug in a HS USB Flash drive and it is properly detected. I can mount the drive and write any amount of data to it without any problems. However, when I start reading from the drive, the action halts at some random point with the USB driver indicating that it got less data than it requested in it's transaction. Once this failure occurs, the port gets reset and the inserted Flash drive is "detected" again but none of the descriptors can be retrieved to actually configure/enumerate the device. After a few more reset cycles the process just halts. The console messages are the following.. --- Console Messages --- <7>usb-storage: waiting for device to settle before scanning scsi 0:0:0:0: Direct-Access USB DISK 2.0 PMAP PQ: 0 ANSI: 0 CCS sd 0:0:0:0: [sda] 964608 512-byte hardware sectors (494 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Assuming drive cache: write through sd 0:0:0:0: [sda] 964608 512-byte hardware sectors (494 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Assuming drive cache: write through sda: sda1 sd 0:0:0:0: [sda] Attached SCSI removable disk usb 1-2: reset high speed USB device using ehci-omap and address 2 usb 1-2: device descriptor read/64, error -110 usb 1-2: device descriptor read/64, error -110 usb 1-2: reset high speed USB device using ehci-omap and address 2 usb 1-2: device descriptor read/64, error -110 usb 1-2: device descriptor read/64, error -110 usb 1-2: reset high speed USB device using ehci-omap and address 2 usb 1-2: device not accepting address 2, error -110 usb 1-2: reset high speed USB device using ehci-omap and address 2 usb 1-2: device not accepting address 2, error -110 usb 1-2: USB disconnect, address 2 sd 0:0:0:0: Device offlined - not ready after error recovery Result: hostbyte=0x01 driverbyte=0x00 end_request: I/O error, dev sda, sector 775288 end_request: I/O error, dev sda, sector 775288 Result: hostbyte=0x01 driverbyte=0x00 end_request: I/O error, dev sda, sector 775528 end_request: I/O error, dev sda, sector 775528 usb 1-2: new high speed USB device using ehci-omap and address 3 usb 1-2: device descriptor read/64, error -110 usb 1-2: device descriptor read/64, error -110 usb 1-2: new high speed USB device using ehci-omap and address 4 usb 1-2: device descriptor read/64, error -110 usb 1-2: device descriptor read/64, error -110 usb 1-2: new high speed USB device using ehci-omap and address 5 usb 1-2: device not accepting address 5, error -110 usb 1-2: new high speed USB device using ehci-omap and address 6 usb 1-2: device not accepting address 6, error -110 hub 1-0:1.0: unable to enumerate USB device on port 2 --- End Messages -- Why the writes succeed without any issues while the reads fail has me completely stumped. I'm currently using The Linux Kernel version 2.6.24.7 from omapzoom.org with the /drivers/usb code from the latest 2.6.26 back-ported. Attempting to jump to the newest Kernel would require some work to get my board-specific code all happy and I'm in the process of doing that.. I would love to hear from ideas on what might be going on and what I should be looking at to get this resolved. Regards ~ Ashwin -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
