mbox series

[v4,vfio,0/2] vfio/pds: Fixes for locking bugs

Message ID 20231122192532.25791-1-brett.creeley@amd.com
Headers
Series vfio/pds: Fixes for locking bugs |

Message

Brett Creeley Nov. 22, 2023, 7:25 p.m. UTC 
  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.

v4:
- Drop patch 1/3 since it added a spinlock_init that was later replaced
  by a mutex_init anyway

v3:
https://lore.kernel.org/kvm/20231027223651.36047-1-brett.creeley@amd.com/
- Change reset lock from spinlock to mutex

v2:
https://lore.kernel.org/kvm/20231011230115.35719-1-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

v1:
https://lore.kernel.org/kvm/20230914191540.54946-1-brett.creeley@amd.com/

Brett Creeley (2):
  vfio/pds: Fix mutex lock->magic != lock warning
  vfio/pds: Fix possible sleep while in atomic context

 drivers/vfio/pci/pds/pci_drv.c  |  4 ++--
 drivers/vfio/pci/pds/vfio_dev.c | 30 +++++++++++++++++++++---------
 drivers/vfio/pci/pds/vfio_dev.h |  2 +-
 3 files changed, 24 insertions(+), 12 deletions(-)

Comments

Alex Williamson Nov. 27, 2023, 6:08 p.m. UTC | #1 
On Wed, 22 Nov 2023 11:25:30 -0800
Brett Creeley <brett.creeley@amd.com> wrote:

> 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.
> 
> v4:
> - Drop patch 1/3 since it added a spinlock_init that was later replaced
>   by a mutex_init anyway
> 
> v3:
> https://lore.kernel.org/kvm/20231027223651.36047-1-brett.creeley@amd.com/
> - Change reset lock from spinlock to mutex
> 
> v2:
> https://lore.kernel.org/kvm/20231011230115.35719-1-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
> 
> v1:
> https://lore.kernel.org/kvm/20230914191540.54946-1-brett.creeley@amd.com/
> 
> Brett Creeley (2):
>   vfio/pds: Fix mutex lock->magic != lock warning
>   vfio/pds: Fix possible sleep while in atomic context
> 
>  drivers/vfio/pci/pds/pci_drv.c  |  4 ++--
>  drivers/vfio/pci/pds/vfio_dev.c | 30 +++++++++++++++++++++---------
>  drivers/vfio/pci/pds/vfio_dev.h |  2 +-
>  3 files changed, 24 insertions(+), 12 deletions(-)
> 

Applied to vfio for-linus branch for v6.7.  Thanks,

Alex