[U-Boot] [PATCH] usb: fix unaligned access in device_qual()

[Marek Vasut <marex@denx.de>]

Dear Stefan Roese,

> Hi Albert,
> 
> On 06/27/2013 12:11 PM, Albert ARIBAUD wrote:
> >> while playing with dfu, I tapped in an unaligned access
> >> when doing on the host side a "lsusb -d [vendornr]: -v"
> >> I get on the board:
> >> 
> >> GADGET DRIVER: usb_dnl_dfu
> >> data abort
> >> 
> >>     MAYBE you should read doc/README.arm-unaligned-accesses
> >> 
> >> pc : [<8ff71db8>]          lr : [<8ff75aec>]
> >> sp : 8ef40d18  ip : 00000005     fp : 00000000
> >> r10: 00000000  r9 : 47401410     r8 : 8ef40f38
> >> r7 : 8ef4aae8  r6 : 0000000a     r5 : 8ef4ab28  r4 : 8ef4ab80
> >> r3 : 0000000a  r2 : 00000006     r1 : 00000006  r0 : 8ef4aae8
> >> Flags: Nzcv  IRQs off  FIQs on  Mode SVC_32
> >> Resetting CPU ...
> >> 
> >> reason is that in the "struct usb_composite_dev" the
> >> "struct usb_device_descriptor desc;" is on an odd address,
> >> and this struct gets accessed in
> >> drivers/usb/gadget/composite.c device_qual()
> >> 
> >> Fix it, by align this var "struct desc" fix to an aligned
> >> address.
> > 
> > Please keep the commit message to a minimum -- what is wrong and how it
> > is fixed -- and move the rest (context and additional details) after
> > the commit message separator ('---' below).
> 
> I personally find this expanded description quite helpful. Everything
> below the "---" line is removed from the git history. So +1 for this
> expanded description from me.

Agreed

Best regards,
Marek Vasut