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Date:   Mon, 18 Sep 2023 10:23:42 +0100
From:   Will Deacon <will@kernel.org>
To:     Baolu Lu <baolu.lu@linux.intel.com>
Cc:     Nicolin Chen <nicolinc@nvidia.com>, robin.murphy@arm.com,
        joro@8bytes.org, jgg@nvidia.com, jean-philippe@linaro.org,
        apopple@nvidia.com, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev,
        stable@vger.kernel.org
Subject: Re: [PATCH] iommu/arm-smmu-v3: Fix soft lockup triggered by
 arm_smmu_mm_invalidate_range
Message-ID: <20230918092341.GB17341@willie-the-truck>
References: <20230901203904.4073-1-nicolinc@nvidia.com>
 <ZQQLNmmAOsNmvtDs@Asurada-Nvidia>
 <9334dfcd-7749-6ae1-1170-b4952f2b8181@linux.intel.com>
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On Mon, Sep 18, 2023 at 01:33:31PM +0800, Baolu Lu wrote:
> On 9/15/23 3:43 PM, Nicolin Chen wrote:
> > I found this patch cannot be applied to v6.6-rc1 due to conflicts
> > with some new commits that were merged during the previous cycle.
> > 
> > I can redo a version rebasing on the v6.6-rc1, yet the new version
> > won't apply to earlier kernel stable trees. Is there a way to make
> > it happen that both mainline and earlier trees can have this fix?
> 
> Normally, bug fixes should first be submitted to the mainline kernel
> (also known as Linus's tree). If you use the "Fixes" and "CC-stable"
> tags, the patch will be automatically picked up for the appropriate
> stable kernels.
> 
> If the patch does not apply to any stable kernel that you want it to be
> there, you can then post a back-ported patch to the stable mailing list.
> 
> When doing so, it's better to include the following information:
> 
> - The mainline commit ID of the back-ported patch.
> - The versions of the stable kernel(s) to which you want the back-ported
>   patch to be applied.
> 
> Hope this helps.

Yup, please send a version against -rc1 so we can land that first.

Will