Messages in this thread | | | Subject | Re: [PATCH v3 0/4] scsi: add runtime PM workaround for SD cardreaders | From | Martin Kepplinger <> | Date | Sun, 28 Mar 2021 17:16:23 +0200 |
| |
Am Sonntag, dem 28.03.2021 um 10:58 -0400 schrieb 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
that makes me worry less about enabling this for "Generic", "Ultra HS- SD/MMC" then. thanks.
it also makes me think about whether sd should implement this even for system-resume (not only runtime resume), but I guess that's a minor issue we could add at any time later.
martin
| |