From a56e6334d1b7ed6e6faaa8b4612d948005ba74f5 Mon Sep 17 00:00:00 2001 From: Vincenzo Maffione Date: Tue, 19 Nov 2019 21:29:49 +0000 Subject: [PATCH] netmap: check if we already ran mmap before we attempt it Submitted by: neel@neelc.org Reviewed by: vmaffione MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D22390 --- sys/net/netmap_user.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sys/net/netmap_user.h b/sys/net/netmap_user.h index 2638e45c69c..1e43aaedbfd 100644 --- a/sys/net/netmap_user.h +++ b/sys/net/netmap_user.h @@ -981,7 +981,8 @@ nm_close(struct nm_desc *d) static int nm_mmap(struct nm_desc *d, const struct nm_desc *parent) { - //XXX TODO: check if mmap is already done + if (d->done_mmap) + return 0; if (IS_NETMAP_DESC(parent) && parent->mem && parent->req.nr_arg2 == d->req.nr_arg2) {