Re: [PATCH v3 0/4] scsi: add runtime PM workaround for SD cardreaders

[Alan Stern]

On Sun, Mar 28, 2021 at 12:25:27PM +0200, Martin Kepplinger wrote:
> hi,
> 
> In short: there are SD cardreaders that send MEDIA_CHANGED on
> (runtime) resume. We cannot use runtime PM with these devices as
> I/O always fails. I'd like to discuss a way to fix this
> or at least allow us to work around this problem:

In fact, as far as I know _all_ USB SD card readers send Media Changed 
notifications on resume.  Maybe there are some that don't, but I haven't 
heard of any.

Alan Stern