From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id B0EC11BE8B; Fri, 6 Jul 2018 16:18:19 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Jul 2018 07:18:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,316,1526367600"; d="scan'208";a="243511291" Received: from dpdk51.sh.intel.com ([10.67.110.190]) by fmsmga006.fm.intel.com with ESMTP; 06 Jul 2018 07:17:52 -0700 From: Qi Zhang To: thomas@monjalon.net, anatoly.burakov@intel.com Cc: konstantin.ananyev@intel.com, dev@dpdk.org, bruce.richardson@intel.com, ferruh.yigit@intel.com, benjamin.h.shelton@intel.com, narender.vangati@intel.com, Qi Zhang , stable@dpdk.org Date: Fri, 6 Jul 2018 22:18:09 +0800 Message-Id: <20180706141826.204044-3-qi.z.zhang@intel.com> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20180706141826.204044-1-qi.z.zhang@intel.com> References: <20180607123849.14439-1-qi.z.zhang@intel.com> <20180706141826.204044-1-qi.z.zhang@intel.com> Subject: [dpdk-dev] [PATCH v9 02/19] bus/pci: fix PCI address compare X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Jul 2018 14:18:20 -0000 When use memcmp to compare two PCI address, sizeof(struct rte_pci_addr) is 4 bytes aligned, and it is 8. While only 7 byte of struct rte_pci_addr is valid. So compare the 8th byte will cause the unexpected result, which happens when repeatedly attach/detach a device. Fixes: c752998b5e2e ("pci: introduce library and driver") Cc: stable@dpdk.org Signed-off-by: Qi Zhang --- drivers/bus/pci/linux/pci_vfio.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/bus/pci/linux/pci_vfio.c b/drivers/bus/pci/linux/pci_vfio.c index aeeaa9ed8..dd25c3542 100644 --- a/drivers/bus/pci/linux/pci_vfio.c +++ b/drivers/bus/pci/linux/pci_vfio.c @@ -43,6 +43,17 @@ static struct rte_tailq_elem rte_vfio_tailq = { }; EAL_REGISTER_TAILQ(rte_vfio_tailq) +/* Compair two pci address */ +static int pci_addr_cmp(struct rte_pci_addr *addr1, struct rte_pci_addr *addr2) +{ + if (addr1->domain == addr2->domain && + addr1->bus == addr2->bus && + addr1->devid == addr2->devid && + addr1->function == addr2->function) + return 0; + return 1; +} + int pci_vfio_read_config(const struct rte_intr_handle *intr_handle, void *buf, size_t len, off_t offs) @@ -642,7 +653,7 @@ pci_vfio_unmap_resource(struct rte_pci_device *dev) vfio_res_list = RTE_TAILQ_CAST(rte_vfio_tailq.head, mapped_pci_res_list); /* Get vfio_res */ TAILQ_FOREACH(vfio_res, vfio_res_list, next) { - if (memcmp(&vfio_res->pci_addr, &dev->addr, sizeof(dev->addr))) + if (pci_addr_cmp(&vfio_res->pci_addr, &dev->addr)) continue; break; } -- 2.13.6