From: Jeff Dike The network driver wasn't checking that the host side of an interface had been successfully opened before trying to close it at shuwtdown. Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton --- 25-akpm/arch/um/drivers/net_kern.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletion(-) diff -puN arch/um/drivers/net_kern.c~uml-fix-a-shutdown-hang-caused-by-a-failed-ifconfig arch/um/drivers/net_kern.c --- 25/arch/um/drivers/net_kern.c~uml-fix-a-shutdown-hang-caused-by-a-failed-ifconfig 2005-03-07 22:16:14.000000000 -0800 +++ 25-akpm/arch/um/drivers/net_kern.c 2005-03-07 22:16:14.000000000 -0800 @@ -728,7 +728,8 @@ static void close_devices(void) list_for_each(ele, &opened){ lp = list_entry(ele, struct uml_net_private, list); - if(lp->close != NULL) (*lp->close)(lp->fd, &lp->user); + if((lp->close != NULL) && (lp->fd >= 0)) + (*lp->close)(lp->fd, &lp->user); if(lp->remove != NULL) (*lp->remove)(&lp->user); } } _