[Qemu-devel] [PATCH-for-4.1 v6 0/5] hw/block/pflash_cfi01: Add DeviceReset() handler

[Philippe Mathieu-Daudé]

Hello it's me again, insisting with this series because there are at
least 2 different report of guests bricked on reset due to the bug
fixed by patch #5:
https://bugzilla.redhat.com/show_bug.cgi?id=1678713
https://bugzilla.redhat.com/show_bug.cgi?id=1704584

Patches missing review: 2 and 3

The pflash device lacks a reset() function.
When a machine is resetted, the flash might be in an
inconsistent state, leading to unexpected behavior.
Resolve this issue by adding a DeviceReset() handler.

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

Since v5: https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg03366.html
- avoid trying to be spec-compliant and messing with migration. KISS.
  review/test tags reset, sorry.

$ git backport-diff -u v5
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:[----] [-C] 'hw/block/pflash_cfi01: Removed an unused timer'
002/5:[down] 'hw/block/pflash_cfi01: Document use of non-CFI compliant command 
'0x00''
003/5:[0031] [FC] 'hw/block/pflash_cfi01: Extract pflash_mode_read_array()'
004/5:[down] 'hw/block/pflash_cfi01: Rename 'reset_flash' label as 
'mode_read_array''
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: Document use of non-CFI compliant command
    '0x00'
  hw/block/pflash_cfi01: Extract pflash_mode_read_array()
  hw/block/pflash_cfi01: Rename 'reset_flash' label as 'mode_read_array'
  hw/block/pflash_cfi01: Add the DeviceReset() handler

 hw/block/pflash_cfi01.c | 77 +++++++++++++++++++++--------------------
 hw/block/trace-events   |  1 +
 2 files changed, 41 insertions(+), 37 deletions(-)

-- 
2.20.1