On Thu, 6 Jun 2019 at 09:08, Sasha Levin <sashal@xxxxxxxxxx> wrote: > > On Wed, Jun 05, 2019 at 07:14:12PM +0800, Chunyan Zhang wrote: > >From: "Strashko, Grygorii" <grygorii.strashko@xxxxxx> > > > >[ Upstream commit 013c074f8642d8e815ad670601f8e27155a74b57 ] > > > >It is unsafe [1] if probing of devices will happen during suspend or > >hibernation and system behavior will be unpredictable in this case. > >So, let's prohibit device's probing in dpm_prepare() and defer their > >probing instead. The normal behavior will be restored in > >dpm_complete(). > > > >This patch introduces new DD core APIs: > > device_block_probing() > > It will disable probing of devices and defer their probes instead. > > device_unblock_probing() > > It will restore normal behavior and trigger re-probing of deferred > > devices. > > > >[1] https://lkml.org/lkml/2015/9/11/554 > > > >Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx> > >Acked-by: Pavel Machek <pavel@xxxxxx> > >Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > >Signed-off-by: Chunyan Zhang <zhang.chunyan@xxxxxxxxxx> > > This patch had to be fixed a few times (see 015bb5e134 and 9a2a5a638f8), > we can't just take it as is. > > It might be just simpler to move to a newer kernel at this point. Thanks for the information and suggestion! Chunyan > > -- > Thanks, > Sasha
