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From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org,
	shivani.agarwal@broadcom.com
Cc: Sasha Levin <sashal@kernel.org>
Subject: Re: [PATCH 2/2 v5.10] dm rq: don't queue request to blk-mq during DM suspend
Date: Mon, 11 Aug 2025 18:30:30 -0400
Message-Id: <1754925507-8563750b@stable.kernel.org>
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[ Sasha's backport helper bot ]

Hi,

Summary of potential issues:
❌ Build failures detected

The upstream commit SHA1 provided is correct: b4459b11e84092658fa195a2587aff3b9637f0e7

WARNING: Author mismatch between patch and upstream commit:
Backport author: Shivani Agarwal <shivani.agarwal@broadcom.com>
Commit author: Ming Lei <ming.lei@redhat.com>

Status in newer kernel trees:
6.15.y | Present (exact SHA1)
6.12.y | Present (exact SHA1)
6.6.y | Present (exact SHA1)
6.1.y | Present (exact SHA1)
5.15.y | Present (exact SHA1)

Note: The patch differs from the upstream commit:
---
1:  b4459b11e840 ! 1:  d0cf570e337e dm rq: don't queue request to blk-mq during DM suspend
    @@ Metadata
      ## Commit message ##
         dm rq: don't queue request to blk-mq during DM suspend
     
    +    commit b4459b11e84092658fa195a2587aff3b9637f0e7 upstream.
    +
         DM uses blk-mq's quiesce/unquiesce to stop/start device mapper queue.
     
         But blk-mq's unquiesce may come from outside events, such as elevator
    @@ Commit message
         Cc: stable@vger.kernel.org
         Signed-off-by: Ming Lei <ming.lei@redhat.com>
         Signed-off-by: Mike Snitzer <snitzer@redhat.com>
    +    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    +    [Shivani: Modified to apply on 5.10.y]
    +    Signed-off-by: Shivani Agarwal <shivani.agarwal@broadcom.com>
     
      ## drivers/md/dm-rq.c ##
     @@ drivers/md/dm-rq.c: static blk_status_t dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
    @@ drivers/md/dm-rq.c: static blk_status_t dm_mq_queue_rq(struct blk_mq_hw_ctx *hct
     +
      	if (unlikely(!ti)) {
      		int srcu_idx;
    - 		struct dm_table *map = dm_get_live_table(md, &srcu_idx);
    + 		struct dm_table *map;

---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| origin/linux-5.10.y       | Success     | Failed     |

Build Errors:
origin/linux-5.10.y:
    Build error: Building current HEAD with log output
    Build x86: exited with code 2
    Cleaning up worktrees...
    Cleaning up worktrees...
    Cleaning up worktrees...
    Cleaning up worktrees...