On 05/30/2018 08:43 PM, John Snow wrote:
> Commit d759c951f changed the main thread lock release/reacquisition,
> and in so doing apparently jostled loose a race condition in the AHCI
> code.
>
> Patch 2 should be sufficient to fix this, and patches 1 and 3 are just
> little trivial fixes.
>
> This might be sufficient to fix the bug as reported at
> https://bugs.launchpad.net/qemu/+bug/1769189
> but the nature of the timing changes make it difficult to confirm,
> so I am posting this patchset for the reporters to help test.
>
> John Snow (3):
> ahci: trim signatures on raise/lower
> ahci: fix PxCI register race
> ahci: don't schedule unnecessary BH
>
> hw/ide/ahci.c | 24 +++++++++++-------------
> 1 file changed, 11 insertions(+), 13 deletions(-)
>
Thanks for the testing and reviews, everyone!
Thanks, applied to my IDE tree:
https://github.com/jnsnow/qemu/commits/ide
https://github.com/jnsnow/qemu.git
--js
