linux-kernel - Re: [PATCH v2 2/2] x86/PCI: sta2x11: use default DMA address translation

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Date:   Thu, 31 Oct 2019 14:59:00 +0100
From:   Alessandro Rubini <rubini@...dd.com>
To:     nsaenzjulienne@...e.de
Cc:     hch@...radead.org, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        x86@...nel.org, bhelgaas@...gle.com, helgaas@...nel.org,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH v2 2/2] x86/PCI: sta2x11: use default DMA address
 translation

>> But I can't tested it either, and kinda wonder if this code is actually
>> still used by anyone..

I wonder too.

> Maybe Alessandro can shine some light on this (though I wonder his
> mail is stil valid).

Yes, the mail is valid, and I'm busy as usual.

Now, this STA2X11 is a chipset by ST-Ericcson that was bringing the
AMBA peripherals to the PC world. It was meant to be used as an I/O
device in the automotive sector, as far as I know (the audio part had
features aimed at automotive installations).  I'm sure the chip was
never used in standard PC's -- the eval board was a PCIe slot, but
that's it.

So, I can't test and I don't know if there are users of this chip.
If there are users, they are big numbers.  I think we can accept any
clean-up patch on the code base: if anything goes wrong, the users
will surface with a fix when they'll consider an upgrade to their
installed systems.

/alessndro