From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gaetan Rivet Subject: [PATCH v6 16/22] bus/vdev: fix find device implementation Date: Fri, 13 Apr 2018 15:22:31 +0200 Message-ID: <5579b2f2895eed8693bdcd5c6c90c8d2af77658c.1523625525.git.gaetan.rivet@6wind.com> References: Cc: Gaetan Rivet , stable@dpdk.org To: dev@dpdk.org Return-path: Received: from mail-wm0-f65.google.com (mail-wm0-f65.google.com [74.125.82.65]) by dpdk.org (Postfix) with ESMTP id 324F01C18A for ; Fri, 13 Apr 2018 15:23:18 +0200 (CEST) Received: by mail-wm0-f65.google.com with SMTP id t67so5243087wmt.0 for ; Fri, 13 Apr 2018 06:23:18 -0700 (PDT) In-Reply-To: In-Reply-To: References: List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" If start is set and a device before it matches the data, this device is returned. This induces potentially infinite loops. Fixes: c7fe1eea8a74 ("bus: simplify finding starting point") Cc: stable@dpdk.org Signed-off-by: Gaetan Rivet --- drivers/bus/vdev/rte_bus_vdev.h | 3 +++ drivers/bus/vdev/vdev.c | 14 +++++++++----- 2 files changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/bus/vdev/rte_bus_vdev.h b/drivers/bus/vdev/rte_bus_vdev.h index 646d6c090..f9b5eb596 100644 --- a/drivers/bus/vdev/rte_bus_vdev.h +++ b/drivers/bus/vdev/rte_bus_vdev.h @@ -25,6 +25,9 @@ struct rte_vdev_device { #define RTE_DEV_TO_VDEV(ptr) \ container_of(ptr, struct rte_vdev_device, device) +#define RTE_DEV_TO_VDEV_CONST(ptr) \ + container_of(ptr, const struct rte_vdev_device, device) + static inline const char * rte_vdev_device_name(const struct rte_vdev_device *dev) { diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c index f8dd1f5e6..c135554c0 100644 --- a/drivers/bus/vdev/vdev.c +++ b/drivers/bus/vdev/vdev.c @@ -358,15 +358,19 @@ static struct rte_device * vdev_find_device(const struct rte_device *start, rte_dev_cmp_t cmp, const void *data) { + const struct rte_vdev_device *vstart; struct rte_vdev_device *dev; - TAILQ_FOREACH(dev, &vdev_device_list, next) { - if (start && &dev->device == start) { - start = NULL; - continue; - } + if (start != NULL) { + vstart = RTE_DEV_TO_VDEV_CONST(start); + dev = TAILQ_NEXT(vstart, next); + } else { + dev = TAILQ_FIRST(&vdev_device_list); + } + while (dev != NULL) { if (cmp(&dev->device, data) == 0) return &dev->device; + dev = TAILQ_NEXT(dev, next); } return NULL; } -- 2.11.0