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[24.205.208.113]) by smtp.gmail.com with ESMTPSA id y15-20020a056870b00f00b000d75f1d9b81sm7762654oae.46.2022.03.15.05.41.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Mar 2022 05:41:54 -0700 (PDT) From: trix@redhat.com To: mst@redhat.com, jasowang@redhat.com, nathan@kernel.org, ndesaulniers@google.com, lingshan.zhu@intel.com, sgarzare@redhat.com, xieyongji@bytedance.com Cc: virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Tom Rix Subject: [PATCH] vDPA/ifcvf: match pointer check to use Date: Tue, 15 Mar 2022 05:41:30 -0700 Message-Id: <20220315124130.1710030-1-trix@redhat.com> X-Mailer: git-send-email 2.26.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE 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 From: Tom Rix Clang static analysis reports this issue ifcvf_main.c:49:4: warning: Called function pointer is null (null dereference) vf->vring->cb.callback(vring->cb.private); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The check vring = &vf->vring[i]; if (vring->cb.callback) Does not match the use. Change dereference so they match. Fixes: 79333575b8bd ("vDPA/ifcvf: implement shared IRQ feature") Signed-off-by: Tom Rix --- drivers/vdpa/ifcvf/ifcvf_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index 3b48e717e89f7..4366320fb68d3 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -46,7 +46,7 @@ static irqreturn_t ifcvf_vqs_reused_intr_handler(int irq, void *arg) for (i = 0; i < vf->nr_vring; i++) { vring = &vf->vring[i]; if (vring->cb.callback) - vf->vring->cb.callback(vring->cb.private); + vring->cb.callback(vring->cb.private); } return IRQ_HANDLED; -- 2.26.3