linux-kernel - [PATCH v2 0/3] xen-blk{front,back}: Fix the broken semantic and flow of feature-persistent

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Date:   Wed, 31 Aug 2022 16:58:21 +0000
From:   SeongJae Park <sj@...nel.org>
To:     jgross@...e.com, roger.pau@...rix.com
Cc:     SeongJae Park <sj@...nel.org>, marmarek@...isiblethingslab.com,
        mheyne@...zon.de, xen-devel@...ts.xenproject.org, axboe@...nel.dk,
        ptyadav@...zon.de, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/3] xen-blk{front,back}: Fix the broken semantic and flow of feature-persistent

Changes from v1
(https://lore.kernel.org/xen-devel/20220825161511.94922-1-sj@kernel.org/)
- Fix the wrong feature_persistent caching position of blkfront
- Set blkfront's feature_persistent field setting with simple '&&'
  instead of 'if' (Pratyush Yadav)

This patchset fixes misuse of the 'feature-persistent' advertisement
semantic (patches 1 and 2), and the wrong timing of the
'feature_persistent' value caching, which made persistent grants feature
always disabled.

SeongJae Park (3):
  xen-blkback: Advertise feature-persistent as user requested
  xen-blkfront: Advertise feature-persistent as user requested
  xen-blkfront: Cache feature_persistent value before advertisement

 drivers/block/xen-blkback/common.h |  3 +++
 drivers/block/xen-blkback/xenbus.c |  6 ++++--
 drivers/block/xen-blkfront.c       | 20 ++++++++++++--------
 3 files changed, 19 insertions(+), 10 deletions(-)

-- 
2.25.1