From: Gerd Hoffmann <kraxel@redhat.com> Subject: [RHEL-5.1 PATCH 8/10] xen: blktap race #2 Date: Fri, 15 Jun 2007 10:49:20 +0200 Bugzilla: 222128 Message-Id: <46725290.503@redhat.com> Changelog: [xen] xen: blktap race #2 Hi, This patch fixes yet another race in the blktap driver. cheers, Gerd # HG changeset patch # User Jake Wires <jwires@xensource.com> # Date 1163731648 28800 # Node ID f0ba459065d32b61c9d04ccde5787e48e23be782 # Parent f1d2860c51370f7a89c5b8b6b7941b8975928349 [BLKTAP] fix race between ufe_ring and blk_ring in blktap.c Signed-off-by: Jake Wires <jwires@xensource.com> --- drivers/xen/blktap/blktapmain.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-2.6.18.noarch/drivers/xen/blktap/blktapmain.c =================================================================== --- linux-2.6.18.noarch.orig/drivers/xen/blktap/blktapmain.c +++ linux-2.6.18.noarch/drivers/xen/blktap/blktapmain.c @@ -1002,9 +1002,9 @@ static int blktap_read_ufe_ring(tap_blki map[offset] = NULL; } fast_flush_area(pending_req, pending_idx, usr_idx, info->minor); + info->idx_map[usr_idx] = INVALID_REQ; make_response(blkif, pending_req->id, res.operation, res.status); - info->idx_map[usr_idx] = INVALID_REQ; blkif_put(pending_req->blkif); free_req(pending_req); }