linux-kernel - [PATCH v2 vfio 0/3] pds/vfio: Fixes for locking bugs

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Message-ID: <20231011230115.35719-1-brett.creeley@amd.com>
Date:   Wed, 11 Oct 2023 16:01:12 -0700
From:   Brett Creeley <brett.creeley@....com>
To:     <jgg@...pe.ca>, <yishaih@...dia.com>,
        <shameerali.kolothum.thodi@...wei.com>, <kevin.tian@...el.com>,
        <alex.williamson@...hat.com>, <dan.carpenter@...aro.org>
CC:     <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <brett.creeley@....com>, <shannon.nelson@....com>
Subject: [PATCH v2 vfio 0/3] pds/vfio: Fixes for locking bugs

This series contains fixes for locking bugs in the recently introduced
pds-vfio-pci driver. There was an initial bug reported by Dan Carpenter
at:

https://lore.kernel.org/kvm/1f9bc27b-3de9-4891-9687-ba2820c1b390@moroto.mountain/

However, more locking bugs were found when looking into the previously
mentioned issue. So, all fixes are included in this series.

v2:
https://lore.kernel.org/kvm/20230914191540.54946-1-brett.creeley@amd.com/
- Trim the OOPs in the patch commit messages
- Rework patch 3/3 to only unlock the spinlock once
- Destroy the state_mutex in the driver specific vfio_device_ops.release
  callback

Brett Creeley (3):
  pds/vfio: Fix spinlock bad magic BUG
  pds/vfio: Fix mutex lock->magic != lock warning
  pds/vfio: Fix possible sleep while in atomic context

 drivers/vfio/pci/pds/vfio_dev.c | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

-- 
2.17.1