Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?
Luis R. Rodriguez
mcgrof at kernel.org
Wed Jun 6 22:55:22 UTC 2018
On Thu, Jun 07, 2018 at 12:41:12AM +0200, Ard Biesheuvel wrote:
> On 7 June 2018 at 00:29, Luis R. Rodriguez <mcgrof at kernel.org> wrote:
> > Given no one is providing a clear answer, and we cannot easily describe the
> > buffer at run time we'll just move forward with READING_FIRMWARE_DMA_COHERENT.
>
> I seriously wonder whether the QCOM code cannot switch to the
> streaming API instead. That is generally preferred anyway (for
> performance, although that should not matter for loading firmware) but
> also removes this single wart for which we have to invent new flags
> and new security code plus the associated validation overhead.
Given 1 month and no response I don't think we can count on that at this point.
Luis
--
Do not panic
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