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Date: Fri, 15 Dec 2023 18:25:50 +0100
From: Greg KH <gregkh@linuxfoundation.org>
To: Mahmoud Adam <mngyadam@amazon.com>
Cc: stable@vger.kernel.org
Subject: Re: backport: perf/x86/uncore: Don't WARN_ON_ONCE() for a broken
 discovery table
Message-ID: <2023121545-willing-grew-7edb@gregkh>
References: <lrkyqil4zh097.fsf@dev-dsk-mngyadam-1c-a2602c62.eu-west-1.amazon.com>
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In-Reply-To: <lrkyqil4zh097.fsf@dev-dsk-mngyadam-1c-a2602c62.eu-west-1.amazon.com>

On Fri, Dec 15, 2023 at 05:57:24PM +0100, Mahmoud Adam wrote:
> Hi,
> 
> Please backport following commit to 6.1 and 5.15.
> 
> Commit 5d515ee40cb57ea5331998f27df7946a69f14dc3 upstream
> 
> On SPR MCC the discovery table of UPI is broken, there is a patchset [1]
> to mitigate this which landed around v6.3, this can't be backported to
> stable releases since it is based on SPR related patches which will be
> needed in case of mitigation backport, but already WARN_ON_ONCE in this
> case is not needed here since this is hardware problem that linux can do
> nothing about it, this patch replace WARN_ON_ONCE with pr_info, and
> specify what uncore unit is dropped and the reason
> 
> [1] https://lore.kernel.org/all/20230112200105.733466-1-kan.liang@linux.intel.com/

Now queued up, thanks.

greg k-h