Re: [PATCH 17/17] mmc: pass queue_limits to blk_mq_alloc_disk

[Christoph Hellwig <hch@lst.de>]

On Thu, Jun 27, 2024 at 10:58:58AM +0100, Jon Hunter wrote:
>
> On 27/06/2024 10:49, Christoph Hellwig wrote:
>> On Thu, Jun 27, 2024 at 10:43:24AM +0100, Jon Hunter wrote:
>>> We have just noticed that since Linux v6.9 was released, that if we
>>> build the kernel with 64kB MMU pages, then we see the following WARNING
>>> and probe failure ...
>>
>> The old code upgraded the limits to the PAGE_SIZE for this case after
>> issunig a warning.  Your driver probably incorrectly advertised the
>> lower max_segment_size.  Try setting it to 64k.  I would have sent you
>> a patch for that, but I can't see what mmc host driver you are using.
>
>
> We are using the sdhci-tegra.c driver. I don't see it set in there, but I 
> see references to max_seg_size in the main sdhci.c driver.

sdhci-tegra.c sets SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC for various
devices, I guess you have one od those?  This sounds like the device
might not actually need it, but I'll need help from the SDHCI and
tegra maintainers here.