From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59175) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fOBgf-0005H1-Il for qemu-devel@nongnu.org; Wed, 30 May 2018 20:43:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fOBge-0006uK-Ps for qemu-devel@nongnu.org; Wed, 30 May 2018 20:43:29 -0400 From: John Snow Date: Wed, 30 May 2018 20:43:20 -0400 Message-Id: <20180531004323.4611-1-jsnow@redhat.com> Subject: [Qemu-devel] [PATCH 0/3] ahci: fix completion race condition List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, qemu-block@nongnu.org Cc: John Snow 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(-) -- 2.14.3