Re: [PATCH 1/1] fbdev: hyperv_fb: Fix hang in kdump kernel when on Hyper-V Gen 2 VMs

[Helge Deller]

On 3/9/25 05:10, Michael Kelley wrote:
> From: Helge Deller <deller@xxxxxx> Sent: Saturday, March 8, 2025 6:59 PM
> > On 2/19/25 00:01, mhkelley58@xxxxxxxxx wrote:
> > > From: Michael Kelley <mhklinux@xxxxxxxxxxx>
> [snip]
>
> > > Reported-by: Thomas Tai <thomas.tai@xxxxxxxxxx>
> > > Fixes: c25a19afb81c ("fbdev/hyperv_fb: Do not clear global screen_info")
> > > Signed-off-by: Michael Kelley <mhklinux@xxxxxxxxxxx>
> > > ---
> > > The "Fixes" tag uses commit c25a19afb81c because that's where the problem
> > > was re-exposed, and how far back a stable backport is needed. But I've
> > > taken a completely different, and hopefully better, approach in the
> > > solution that isn't related to the code changes in c25a19afb81c.
> > >
> > >    drivers/video/fbdev/hyperv_fb.c | 20 +++++++++++++-------
> > >    1 file changed, 13 insertions(+), 7 deletions(-)
> >
> > applied to fbdev tree.
>
> Thank you!
>
> Related, I noticed the patch "fbdev: hyperv_fb: iounmap() the correct
> memory when removing a device" is also in the fbdev for-next branch.
> Wei Liu previously applied this patch to the hyperv-fixes tree (see [1])
> and it's already in linux-next. Won't having it also in fbdev produce a
> merge conflict?
> [1] https://lore.kernel.org/linux-hyperv/Z6wHDw8BssJyQHiM@liuwe-devbox-debian-v2/

Thanks Michael!
I now dropped that patch from the fbdev tree to avoid collisions.

Btw, I'm fine if we agree that all hyperv-fbdev fixes & patches go through
hyperv or other trees. Just let me know.

Helge