Hi,

I'm currently testing v2017.11 on my x86 platform using the xHCI interface to load images via USB keys. But if I don't have any USB key installed, U-Boot crashes:

=> usb reset resetting USB... USB0: Register 7000820 NbrPorts 7 Starting the controller USB XHCI 1.00 scanning bus 0 for devices... 4 USB Device(s) found scanning usb for storage devices... 0 Storage Device(s) found => load usb 0:1 03000000 abc General Protection EIP: 0010:[<7b59030d>] EFLAGS: 00010286 Original EIP :[<fff4330d>] EAX: ffffffff EBX: 7b3556d0 ECX: 00000001 EDX: 00000000 ESI: 00000000 EDI: 00000001 EBP: 7b356430 ESP: 7b336efc DS: 0018 ES: 0018 FS: 0020 GS: 0018 SS: 0018 CR0: 00000033 CR2: 00000000 CR3: 00000000 CR4: 00000600 DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 DR6: ffff0ff0 DR7: 00000400 Stack: 0x7b336f3c : 0x00000000 0x7b336f38 : 0x00000000 0x7b336f34 : 0x00000000 0x7b336f30 : 0x00000000 0x7b336f2c : 0x00000000 0x7b336f28 : 0x00000000 0x7b336f24 : 0x00000000 0x7b336f20 : 0x00000000 0x7b336f1c : 0x00000000 0x7b336f18 : 0x00000000 0x7b336f14 : 0x00000000 0x7b336f10 : 0x7b3556c8 0x7b336f0c : 0x7b554420 0x7b336f08 : 0x7b336f20 0x7b336f04 : 0x7b356420 0x7b336f00 : 0x7b3556d0 --->0x7b336efc : 0x7b590507 0x7b336ef8 : 0x00010286 0x7b336ef4 : 0x00000010 0x7b336ef0 : 0x7b59030d ### ERROR ### Please RESET the board ###

Using v2017.09 this problem does not occur:

=> usb start starting USB... USB0: Register 7000820 NbrPorts 7 Starting the controller USB XHCI 1.00 scanning bus 0 for devices... 4 USB Device(s) found scanning usb for storage devices... 0 Storage Device(s) found => load usb 0:1 03000000 abc ** Bad device usb 0 **

Does anyone have a quick idea, which commit might have introduced this regression?

Thanks, Stefan