Messages in this thread | | | From | Andy Lutomirski <> | Date | Mon, 15 Apr 2019 13:18:56 -0700 | Subject | Re: [PATCH 4.14 05/69] x86/power: Make restore_processor_context() sane |
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On Mon, Apr 15, 2019 at 1:04 PM Pavel Machek <pavel@denx.de> wrote: > > On Mon 2019-04-15 20:58:23, Greg Kroah-Hartman wrote: > > [ Upstream commit 7ee18d677989e99635027cee04c878950e0752b9 ] > > > > My previous attempt to fix a couple of bugs in __restore_processor_context(): > > > > 5b06bbcfc2c6 ("x86/power: Fix some ordering bugs in __restore_processor_context()") > > > > ... introduced yet another bug, breaking suspend-resume. > > > > Rather than trying to come up with a minimal fix, let's try to clean it up > > for real. This patch fixes quite a few things: > > 5b06bbcfc2c6 fixed theoretical bug; rather than porting it to stable > than fixing it up, it would be better not to port it to stable in the > first place or simply revert it there.
Are you sure about that? The bug was reported by real users who had their systems really crash:
https://lore.kernel.org/lkml/?q=0fede9f9-88b0-a6e7-1027-dfb2019b8ef2%40linux.intel.com
https://lore.kernel.org/lkml/CA+55aFwsMuHUBQz5kDNwRf17JnasXMWjvmLq5qXGH-694yeq1w@mail.gmail.com/
And we had a report that the bug got backported:
https://lore.kernel.org/stable/20190407160005.djiw4reapwvbxmgo@debian/
And if we're going to backport some of the fix, we should definitely backport the whole set to avoid having the -stable kernels be in a state that was never in any released kernel.
--Andy https://lore.kernel.org/stable/20190407160005.djiw4reapwvbxmgo@debian/
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