Re: [Qemu-devel] [PATCH] ahci: Fix FLUSH command

[Stefan Hajnoczi <stefanha@redhat.com>]

On Mon, Jul 15, 2013 at 11:34:31AM +0200, Kevin Wolf wrote:
> AHCI couldn't cope with asynchronous commands that aren't doing DMA, it
> simply wouldn't complete them. Due to the bug fixed in commit f68ec837,
> FLUSH commands would seem to have completed immediately even if they
> were still running on the host. After the commit, they would simply hang
> and never unset the BSY bit, rendering AHCI unusable on any OS sending
> flushes.
> 
> This patch adds another callback for the completion of asynchronous
> commands. This is what AHCI really wants to use for its command
> completion logic rather than an DMA completion callback.
> 
> Cc: qemu-stable@nongnu.org
> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
> ---
>  hw/ide/ahci.c     | 8 +++++++-
>  hw/ide/core.c     | 9 +++++++++
>  hw/ide/internal.h | 1 +
>  3 files changed, 17 insertions(+), 1 deletion(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>