[U-Boot] [PATCH v9] usb: align buffers at cacheline

[Marek Vasut <marex@denx.de>]

Dear Puneet Saxena,

> This avoids cache-alignment warnings shown in console
> when a usb command is entered.
> 
> Whenever X bytes of unaligned buffer is invalidated, arm core
> invalidates X + Y bytes as per the cache line size and throws
> these warnings.
> 
> Signed-off-by: Puneet Saxena <puneets@nvidia.com>
> ---

I think we're almost there, hurray! :-)

Though on m28evk this still has issues:

=> usb reset
(Re)start USB...
USB:   Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... EHCI timed out on TD - token=0x80008c80
EHCI timed out on TD - token=0x80008d80
EHCI timed out on TD - token=0x80008c80
EHCI timed out on TD - token=0x80008c80
EHCI timed out on TD - token=0x80008c80
 ERROR: NOT USB_CONFIG_DESC 1
EHCI timed out on TD - token=0x80008d80
2 USB Device(s) found
       scanning bus for storage devices... 0 Storage Device(s) found

I have a single USB pendrive connected to the board.

Also note, that if I disable the caches, it all works even with your patch 
applied. So I suspect there's something even more to this (maybe broken 
ehci_invalidate_dcache() ? ). Where did you test these patches?

Thanks!

Best regards,
Marek Vasut