linux-kernel - RE: [EXT] Re: [PATCH 1/2] mmc: Support kmsg dumper based on pstore/blk

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Date:   Thu, 17 Dec 2020 11:36:34 +0000
From:   Bhaskara Budiredla <bbudiredla@...vell.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
CC:     Kees Cook <keescook@...omium.org>,
        Colin Cross <ccross@...roid.com>,
        "Tony Luck" <tony.luck@...el.com>,
        Sunil Kovvuri Goutham <sgoutham@...vell.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: RE: [EXT] Re: [PATCH 1/2] mmc: Support kmsg dumper based on
 pstore/blk


[...]

>> >> An extra check can be added to see if host was runtime suspended
>> >> ahead of panic write attempt.
>> >
>> >What if that is the case, should we just return an error?
>> >
>> Yes.
>>
>> >Moreover, even the device belonging to the mmc card can be runtime
>> >suspended too. So if that is the case, we should return an error too?
>> >
>>
>> Yes, same here.
>>

Please comment if returning error is sufficient here or
can there be an attempt to wake the device through either of the atomic activation calls:
pm_runtime_get(),  pm_request_resume()? 


Thanks,
Bhaskara