From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 9C29346A02; Fri, 20 Jun 2025 13:47:21 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 2E5DF42E47; Fri, 20 Jun 2025 13:47:21 +0200 (CEST) Received: from ns2.wilbury.net (ns2.wilbury.net [92.60.51.55]) by mails.dpdk.org (Postfix) with ESMTP id 7EB16402F2 for ; Fri, 20 Jun 2025 13:47:19 +0200 (CEST) Received: from webmail.wilbury.net (localhost [IPv6:::1]) (Authenticated sender: priikone@silc.fi) by svc.wilbury.net (Postfix) with ESMTPA id BD0B561F90 for ; Fri, 20 Jun 2025 13:47:17 +0200 (CEST) MIME-Version: 1.0 Date: Fri, 20 Jun 2025 14:47:17 +0300 From: priikone@iki.fi To: dev@dpdk.org Subject: [PATCH] bus/pci: fix automatic interrupt type selection User-Agent: Roundcube Webmail/1.6.10 Message-ID: <8f5b22d3bedef793bf489c230b52b145@iki.fi> X-Sender: priikone@iki.fi Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.8 required=5.0 tests=ALL_TRUSTED,BAYES_00,TW_FD autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on ns2.wilbury.net X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Check if kernel returns 0 interrupt vectors and try another interrupt type in that case. Failing to check the vector count can select an interrupt type that's unusable. Signed-off-by: Pekka Riikonen --- drivers/bus/pci/linux/pci_vfio.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/bus/pci/linux/pci_vfio.c b/drivers/bus/pci/linux/pci_vfio.c index 5317170231..02e7d7e40b 100644 --- a/drivers/bus/pci/linux/pci_vfio.c +++ b/drivers/bus/pci/linux/pci_vfio.c @@ -237,6 +237,10 @@ pci_vfio_setup_interrupts(struct rte_pci_device *dev, int vfio_dev_fd) continue; } + /* If no vectors, try another one */ + if (irq.count == 0) + continue; + /* Reallocate the efds and elist fields of intr_handle based * on PCI device MSIX size. */ -- 2.34.1