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