[Qemu-devel] [PATCH v5 0/5] hw/block/pflash_cfi01: Add DeviceReset() handler

[Philippe Mathieu-Daudé]

Last attempt before sending pull request for rc1.

The pflash device lacks a reset() function.
When a machine is resetted, the flash might be in an
inconsistent state, leading to unexpected behavior:
https://bugzilla.redhat.com/show_bug.cgi?id=1678713
Resolve this issue by adding a DeviceReset() handler.

Fix also two minor issues, and clean a bit the codebase.

Since v1: https://lists.gnu.org/archive/html/qemu-devel/2019-05/msg00962.html
- addressed Laszlo review comments

Since v2: https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg00395.html
- consider migration (Laszlo, Peter)

Since v3: https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg01668.html
- more reliable migration (Dave)
- dropped patches 6-9 not required for next release

Since v4: https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg02785.html
- document why using READ_ARRAY value 0x00 for migration is safe

$ git backport-diff -u v4
Key:
[----] : patches are identical
[####] : number of functional differences between upstream/downstream patch
[down] : patch is downstream-only
The flags [FC] indicate (F)unctional and (C)ontextual differences, respectively

001/5:[----] [--] 'hw/block/pflash_cfi01: Removed an unused timer'
002/5:[----] [--] 'hw/block/pflash_cfi01: Use the correct READ_ARRAY value'
003/5:[----] [--] 'hw/block/pflash_cfi01: Extract pflash_mode_read_array()'
004/5:[----] [--] 'hw/block/pflash_cfi01: Start state machine as READY to 
accept commands'
005/5:[----] [--] 'hw/block/pflash_cfi01: Add the DeviceReset() handler'

Regards,

Phil.

Philippe Mathieu-Daudé (5):
  hw/block/pflash_cfi01: Removed an unused timer
  hw/block/pflash_cfi01: Use the correct READ_ARRAY value
  hw/block/pflash_cfi01: Extract pflash_mode_read_array()
  hw/block/pflash_cfi01: Start state machine as READY to accept commands
  hw/block/pflash_cfi01: Add the DeviceReset() handler

 hw/block/pflash_cfi01.c | 109 +++++++++++++++++++++++++++-------------
 hw/block/trace-events   |   1 +
 2 files changed, 75 insertions(+), 35 deletions(-)

-- 
2.20.1