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
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