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

Amit Virdi amit.virdi at st.com
Wed Mar 7 09:30:24 CET 2012

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.

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?

Amit Virdi

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