On Thu, 7 Sep 2017 06:27:25 +0200 Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > On Thu, Sep 07, 2017 at 12:54:09AM +0000, Dexuan Cui wrote: > > > From: Stephen Hemminger [mailto:stephen@xxxxxxxxxxxxxxxxxx] > > > Sent: Wednesday, August 16, 2017 9:16 AM > > > To: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> > > > Cc: KY Srinivasan <kys@xxxxxxxxxxxxx>; Dexuan Cui <decui@xxxxxxxxxxxxx>; > > > devel@xxxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > > > stable@xxxxxxxxxxxxxxx; Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>; > > > John Starks <jon.Starks@xxxxxxxxxxxxx> > > > Subject: Re: [PATCH] vmbus: fix missing signaling in hv_signal_on_read() > > > > > > On Wed, 16 Aug 2017 09:10:40 -0700 > > > Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > > > > On Wed, Aug 16, 2017 at 08:49:46AM -0700, Stephen Hemminger wrote: > > > > > When the space available before start of reading (cached_write_sz) > > > > > is the same as the host required space (pending_sz), we need to > > > > > still signal host. > > > > > > > > > > Fixes: 433e19cf33d3 ("Drivers: hv: vmbus: finally fix > > > hv_need_to_signal_on_read()") > > > > > > > > > > Signed-off-by: John Starks <jon.Starks@xxxxxxxxxxxxx> > > > > > Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx> > > > > > Signed-off-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx> > > > > > --- > > > > > This patch is for 4.13 (and stable). > > > > > A different fix is needed for linux-next. > > > > > > > > Is there a fix for this in Linus's tree? If so, what's the git commit > > > > id? We need to wait for that until I can take it in -stable. > > > > > > There is no commit yet in Linus's tree. Was submitting for both Linus > > > and stable. Wasn't sure about the timing since 4.13 might close before he gets > > > to it. > > > > Hi Greg and stable@xxxxxxxxxxxxxxx, > > We need the patch for the stable kernels: v4.13, v4.12.10 and v4.9.47. > > > > The patch is not in Linus's tree, because the bug is resolved there by a series > > of 4 patches (see the below). > > > > IMO it's better to apply this small patch to the stable kernels rather than > > backporting the 4 big commits? > > It is always better to backport the original commits. Will they work > as-is, or do they need porting? > > thanks, > > greg k-h The four patches apply (and kernel builds and runs) for 4.12.10 and 4.13. They do not apply to 4.9 unless several other patches are dragged in.