Re: [PATCH] scsi: core: Fix block I/O error of USB card reader during resume

[Michael Wu]

On 8/27/2022 6:05 AM, Bart Van Assche wrote:
> On 8/23/22 03:16, Michael Wu wrote:
> > Yes... My patch did seem suspicious. Here's the scene about the block 
> > I/O error: Some card reader does not respond the command 'MEDIUM 
> > REMOVAL PREVENT' correctly, as a result, the host does not send 
> > subsequent cmd 'MEDIUM REMOVAL ALLOW'/'MEDIUM REMOVAL PREVENT' 
> > before/after sleep, which leads to a enumeration failure after system 
> > resume.
> > I wonder, without changing the behavior of the device, is there's a 
> > better way to solve this? -- Modifying the scsi core should not be a 
> > good idea though :(
>
> The above is not clear to me. My understanding is that "MEDIUM REMOVAL 
> PREVENT" is a sense code instead of a SCSI command?
>
> > Thanks for your kindly notice. I looked around in the latest linux 
> > mainline repo, but could not find this code. Where can I get this 2002 
> > version of scsi_lib.c? Thank you.
>
> Please take a look at 
> https://stackoverflow.com/questions/3264283/linux-kernel-historical-git-repository-with-full-history. 
> That web page has instructions for how to configure a git repository 
> such that history goes back before the time when Linus started using git.
>
> Bart.
Dear Bart,
Thank you. I'll try to figure it out and sync to you later.

--
Regards,
Michael Wu