[U-Boot] [PATCH] USB:host: Attribute packed removed from usb structures

Marek Vasut marex at denx.de
Wed Mar 7 12:38:18 CET 2012

Dear Amit Virdi,

> Dear Marek,
> >> I did the changes suggested by you and tested the build. The issue
> >> didn't come up. Then I reverted the code to the original (attributes
> >> retained and ehci directly de-referencing the pointers. The issue didn't
> >> come here too.
> >> 
> >> Today, I used armv7-linux-gcc (GCC) v4.6.2
> >> So I suspect there has been some fix done in the GCC.
> >> 
> >> Now, even with the packed attributes, the word fields are accessed
> >> word-by-word in contrast to the earlier observed behavior
> >> (byte-by-byte). I could see ldr and str in the disassembly.
> >> 
> >> May be, we can discard this patch and keep drivers/usb/host/ehci.h
> >> intact.
> > 
> > Can you check with different toolchain please?
> Do you mean different toolchains for ARM? I can surely check if you can
> help me. I have used ST's internal distribution till date and I guess I
> need to download and install other ARM toolchains in order to verify
> this issue.

Sure, you can download the ELDK installer for ELDK 5.1 :-)
> Or, we can work this way that my source code is compiled by someone
> already installed/using other tool chains. I can test it on my board and
> report the results?

Yes please. I'll most likely apply your other patchset, but let's keep an eye on 
this patch, it might come handy later if the issue reappears.

> Thanks
> Amit Virdi

Best regards,
Marek Vasut

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