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Thu, 13 Oct 2022 20:05:22 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 49C04B821BD; Fri, 14 Oct 2022 03:05:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78680C433B5; Fri, 14 Oct 2022 03:05:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665716720; bh=jcOAb17nQhKMFlp6op1wJtpKh/mTJQ4vvofAV6VMd94=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t2J+6Xx5wHV528SmBxs5wwM2mexweWFCybwkvdBWoe3BcegNnCR1dG2MKYdTFVi7D kpkhRlgO9TXORLB+4+mBlPT5buUKoj9O0w+wr+IhOm0rivq52uVt6Xsr0BpMd7UEro aXffKvQRoHEmlA0n/klCENDl72XtdZZygyWRwmpexI6tcCIhiOqO7UOFnNBAOYVhcI ZYe3VHrkG4f7bqkxH4O4Kk55Y0IrgSvStPY8n9xhjmcxqGQlonF2iEJZaxjD7tFU+d +tvgz503VWdFXB9MMjPLQJ7yuWnaEgIX7o9i3YynM57ONyNw5SzmBD7IXbXBNf3OfI OkyEptjElzFBw== From: guoren@kernel.org To: andriy.shevchenko@linux.intel.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux@rasmusvillemoes.dk, yury.norov@gmail.com, caraitto@google.com, willemb@google.com, jonolson@google.com, amritha.nambiar@intel.com Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Guo Ren , Guo Ren Subject: [PATCH V2 2/2] net: Fixup virtnet_set_affinity() cause cpumask warning Date: Thu, 13 Oct 2022 23:04:59 -0400 Message-Id: <20221014030459.3272206-3-guoren@kernel.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221014030459.3272206-1-guoren@kernel.org> References: <20221014030459.3272206-1-guoren@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746630851275597071?= X-GMAIL-MSGID: =?utf-8?q?1746630851275597071?= From: Guo Ren Don't pass nr_bits-1 as arg1 for cpumask_next_wrap, which would cause warning now 78e5a3399421 ("cpumask: fix checking valid cpu range"). ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at include/linux/cpumask.h:110 cpumask_next_wrap+0x5c/0x80 Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.0.0-11659-ge7e38f6cce55-dirty #328 Hardware name: riscv-virtio,qemu (DT) epc : cpumask_next_wrap+0x5c/0x80 ra : virtnet_set_affinity+0x1ba/0x1fc epc : ffffffff808992ca ra : ffffffff805d84ca sp : ff60000002327a50 gp : ffffffff81602390 tp : ff600000023a0000 t0 : 5f74656e74726976 t1 : 0000000000000000 t2 : 735f74656e747269 s0 : ff60000002327a90 s1 : 0000000000000003 a0 : 0000000000000003 a1 : ffffffff816051c0 a2 : 0000000000000004 a3 : 0000000000000000 a4 : 0000000000000000 a5 : 0000000000000004 a6 : 0000000000000000 a7 : 0000000000000000 s2 : 0000000000000000 s3 : ffffffff816051c0 s4 : ffffffff8160224c s5 : 0000000000000004 s6 : 0000000000000004 s7 : 0000000000000000 s8 : 0000000000000003 s9 : ffffffff810aa398 s10: ffffffff80e97d20 s11: 0000000000000004 t3 : ffffffff819acc97 t4 : ffffffff819acc97 t5 : ffffffff819acc98 t6 : ff60000002327878 status: 0000000200000120 badaddr: 0000000000000000 cause: 0000000000000003 [] virtnet_set_affinity+0x1ba/0x1fc [] virtnet_probe+0x832/0xf1e [] virtio_dev_probe+0x164/0x2de [] really_probe+0x82/0x224 [] __driver_probe_device+0x5a/0xaa [] driver_probe_device+0x2c/0xb8 [] __driver_attach+0x76/0x108 [] bus_for_each_dev+0x52/0x9a [] driver_attach+0x1a/0x28 [] bus_add_driver+0x154/0x1c2 [] driver_register+0x52/0x108 [] register_virtio_driver+0x1c/0x2c [] virtio_net_driver_init+0x7a/0xb0 [] do_one_initcall+0x66/0x2e4 [] kernel_init_freeable+0x28a/0x304 [] kernel_init+0x1e/0x110 [] ret_from_exception+0x0/0x10 ---[ end trace 0000000000000000 ]--- Fixes: 2ca653d607ce ("virtio_net: Stripe queue affinities across cores.") Signed-off-by: Guo Ren Signed-off-by: Guo Ren --- drivers/net/virtio_net.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 7106932c6f88..e4b56523b2b5 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2300,6 +2300,8 @@ static void virtnet_set_affinity(struct virtnet_info *vi) for (j = 0; j < group_size; j++) { cpumask_set_cpu(cpu, mask); + if (cpu == (nr_cpu_ids - 1)) + break; cpu = cpumask_next_wrap(cpu, cpu_online_mask, nr_cpu_ids, false); }