ACK/cmnt: [SRU] [Bionic/Cosmic/Unstable] [PATCH 0/1] Fix unusable NVIDIA GPU after S3

[Kleber Souza]

On 09/19/18 17:29, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1793338
> 
> [Impact]
> NVIDIA GPU on a new system we have becomes unusable after S3.
> 
> [Test]
> The NVIDIA GPU in question works well after applying this patch.
> 
> [Fix]
> Rewrite 0 to Intel PCI bridge 'Prefetchable Base Upper 32 Bits'.
> This should be done by BIOS S3 code [1], but now the issue reappears, let's
> do the same in Linux PCI subsystem.
> 
> [Regression Potential]
> Low.
> After applying this patch I haven't noticed any change on already
> working PCI devices.
> Also this patch is acked by PCI and ACPI maintainers, so we can be more
> confident.
> 
> [1] https://bugzilla.kernel.org/show_bug.cgi?id=116851#c23
> 
> Daniel Drake (1):
>   PCI: Reprogram bridge prefetch registers on resume
> 
>  drivers/pci/pci.c | 27 +++++++++++++++++++--------
>  1 file changed, 19 insertions(+), 8 deletions(-)
> 

The patch has been queued for v4.19 (instead of v4.20) by the PCI
maintainer:
https://www.spinics.net/lists/netdev/msg525724.html

So I think it's safe to include this in Bionic, even without a SAUCE tag.

Acked-by: Kleber Sacilotto de Souza <kleber.souza at canonical.com>