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SubjectRe: [PATCH] mtd: rawnand: atmel: Unmap streaming DMA mappings

2022-08-17 at 11:28, Thorsten Leemhuis wrote:
> On 28.07.22 09:40, Tudor Ambarus wrote:
>> Every dma_map_single() call should have its dma_unmap_single() counterpart,
>> because the DMA address space is a shared resource and one could render the
>> machine unusable by consuming all DMA addresses.
>> Cc:
>> Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver")
>> Signed-off-by: Tudor Ambarus <>
> This afaics is missing the following tag:
> Link:

Indeed, I can confirm that this patch fixes that regression. Yay!

I didn't realize this previously because 1) vacation and 2) many patches
to juggle and I never tried this one on its until this weekend.

Tested-by: Peter Rosin <>


> These tags are considered important by Linus[1] and others, as they
> allow anyone to look into the backstory weeks or years from now. That is
> why they should be placed in cases like this, as
> Documentation/process/submitting-patches.rst and
> Documentation/process/5.Posting.rst explain in more detail. I care
> personally, because these tags make my regression tracking efforts a
> whole lot easier, as they allow my tracking bot 'regzbot' to
> automatically connect reports with patches posted or committed to fix
> tracked regressions.
> [1] see for example:
> Apropos regzbot, let me tell regzbot to monitor this thread:
> #regzbot ^backmonitor:
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> P.S.: As the Linux kernel's regression tracker I deal with a lot of
> reports and sometimes miss something important when writing mails like
> this. If that's the case here, don't hesitate to tell me in a public
> reply, it's in everyone's interest to set the public record straight.

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