[U-Boot] [PATCH] usb_storage: USB storage transfer size increase for xHCI

Sergei Temerkhanov
2015-08-14T12:09:50Z

OK, I'll try to find some time for this. I remember trying it with DCACHE
disabled but for no luck

Regards,
Sergey

On Fri, Aug 14, 2015 at 1:42 AM, Marek Vasut <marex@denx.de> wrote:

> On Thursday, August 13, 2015 at 10:56:27 PM, Sergei Temerkhanov wrote:
>
> Hi!
>
> (please stop top-posting ; please keep the list in the loop)
>
> > Well, when I was working on this, setting large transfer sizes resulted
> in,
> > AFAIR, xhci_wait_for_event() timeout and changing XHCI_TIMEOUT doesn't
> > help. This function returns NULL which is being dereferenced somewhere
> else
> > (I don't remember where exactly), there are several places in the generic
> > xhci support code where this is possible.
>
> I suspect we might need a quirk for the XHCI instead them (quirk that the
> controller gets stuck when you try to queue arbitrary number of
> descriptors).
> But I wonder, don't you have some cache problems instead ? Try disabling
> dcache (CONFIG_SYS_DCACHE_OFF) on your machine and see if that fixes the
> problem .
>
> Best regards,
> Marek Vasut
>