Re: [PATCH 7/8] dmaengine: fsl-edma: wait until no hardware request is in progress

[Krzysztof Kozlowski]

On 18/12/2024 14:24, Larisa Ileana Grigore wrote:
>>>
>>> Thank you for you review Krzysztof! Indeed, this commit should be moved
>>> right after "dmaengine: fsl-edma: add eDMAv3 registers to edma_regs"
>>
>> I don't understand this. Are you saying you introduce bug in one patch
>> and fix in other? Why this cannot be separate patchset?
> 
> The bug was introduced by 72f5801a4e2b7 ("dmaengine: fsl-edma: integrate 
> v3 support"), commit which is already upstream.
> 
> In the proposed fix, a channel is disabled after checking the HRS 
> register which is a eDMAv3 specific register.
> 
> In the upstream implementation, "struct edma_regs" is created based on 
> the eDMAv2 register layout [1] which is different compared to the eDMAv3 
> register layout.
> The "hrs" field, which is used to access the HRS register, was 
> introduced in one of the patches from this set [2].
> So, this fix depends on two other commits:
> "dmaengine: fsl-edma: add eDMAv3 registers to edma_regs"  [2]
> "dmaengine: fsl-edma: move eDMAv2 related registers to a new structure 
> ’edma2_regs’" [3]

OK, this explains the problem. Your fix cannot depend on other patches.


Best regards,
Krzysztof