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Subject: Re: [PATCH 5.4.33 0/2] Fix for long operation cmds busy detection
To:     Sasha Levin <sashal@kernel.org>
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References: <1587758766-3274-1-git-send-email-skomatineni@nvidia.com>
 <20200425014556.GD13035@sasha-vm>
From:   Sowjanya Komatineni <skomatineni@nvidia.com>
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Date:   Fri, 24 Apr 2020 19:42:16 -0700
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On 4/24/20 6:45 PM, Sasha Levin wrote:
> External email: Use caution opening links or attachments
>
>
> On Fri, Apr 24, 2020 at 01:06:04PM -0700, Sowjanya Komatineni wrote:
>> This series is to backport the upstream patches that fixes busy=20
>> detection
>> for long operation mmc commands by implementing Tegra specific timeout
>> callback to switch between finite and infinite HW busy detection wait
>> modes.
>>
>>
>> Sowjanya Komatineni (2):
>> =C2=A0sdhci: tegra: Implement Tegra specific set_timeout callback
>> =C2=A0sdhci: tegra: Enable MMC_CAP_WAIT_WHILE_BUSY host capability
>
> What regression do these patches fix?
>
This isn't a regression as we don't have any known failures as of today=20
with the specific mmc devices we are using on our platforms.

But this patch fixes a long outstanding bug for sdhci-tegra to handle=20
long busy wait for mmc command operations that may take longer than host=20
max busy timeout. So, this is something that's missing from the=20
beginning and good to have.


> --=20
> Thanks,
> Sasha