Re: FAILED: patch "[PATCH] drm/i915: fix TLB invalidation for Gen12 video and compute" failed to apply to 5.15-stable tree

[Greg KH <gregkh@linuxfoundation.org>]

On Thu, Dec 01, 2022 at 11:26:05AM +0100, Andrzej Hajda wrote:
> 
> 
> On 30.11.2022 19:05, Greg KH wrote:
> > On Wed, Nov 30, 2022 at 06:59:57PM +0100, gregkh@linuxfoundation.org wrote:
> > > The patch below does not apply to the 5.15-stable tree.
> > > If someone wants it applied there, or to any other stable or longterm
> > > tree, then please email the backport, including the original git commit
> > > id to <stable@vger.kernel.org>.
> > > 
> > > Possible dependencies:
> > > 
> > > 04aa64375f48 ("drm/i915: fix TLB invalidation for Gen12 video and compute engines")
> > > 33da97894758 ("drm/i915/gt: Serialize TLB invalidates with GT resets")
> > > 7938d61591d3 ("drm/i915: Flush TLBs before releasing backing store")
> > > 1176d15f0f6e ("Merge tag 'drm-intel-gt-next-2021-10-08' of git://anongit.freedesktop.org/drm/drm-intel into drm-next")
> > > 
> > Ah, wait, I found the tarball you sent for these, and have taken them
> > for 5.4, 5.10, and 5.15 now (the original broke the build.)  We still
> > need them for older kernels though, that's still an issue.
> 
> Thanks for applying patches.
> Older kernels ( < 5.4) do not have the patch to fix ("drm/i915: Flush TLBs
> before releasing backing store"), and they do not support Gen12 AFAIK,
> so it should be fine.

The Fixes: tag in this commit references a commit that has been
backported into a lot of older kernels:

git id: '7938d61591d33394a21bdd7797a245b65428f44c' is in: 4.4.301 4.9.299 4.14.264 4.19.227 5.4.175 5.10.95 5.15.18 5.16.4 5.17

So is the Fixes tag incorrect?

thanks,

greg k-h