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[66.187.233.206]) by smtp.gmail.com with ESMTPSA id y4-20020ac87c84000000b0039a55f78792sm3273434qtv.89.2023.01.08.06.38.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 08 Jan 2023 06:38:53 -0800 (PST) From: Tom Rix To: shayagr@amazon.com, akiyano@amazon.com, darinzon@amazon.com, ndagan@amazon.com, saeedb@amazon.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, nathan@kernel.org, ndesaulniers@google.com, khalasa@piap.pl, wsa+renesas@sang-engineering.com, yuancan@huawei.com, tglx@linutronix.de, 42.hyeyoo@gmail.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Tom Rix Subject: [PATCH] net: ena: initialize dim_sample Date: Sun, 8 Jan 2023 09:38:43 -0500 Message-Id: <20230108143843.2987732-1-trix@redhat.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 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_H2,SPF_HELO_NONE,SPF_NONE 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 clang static analysis reports this problem drivers/net/ethernet/amazon/ena/ena_netdev.c:1821:2: warning: Passed-by-value struct argument contains uninitialized data (e.g., field: 'comp_ctr') [core.CallAndMessage] net_dim(&ena_napi->dim, dim_sample); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net_dim can call dim_calc_stats() which uses the comp_ctr element, so it must be initialized. Fixes: 282faf61a053 ("net: ena: switch to dim algorithm for rx adaptive interrupt moderation") Signed-off-by: Tom Rix --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index e8ad5ea31aff..938184465eae 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -1805,7 +1805,7 @@ static void ena_dim_work(struct work_struct *w) static void ena_adjust_adaptive_rx_intr_moderation(struct ena_napi *ena_napi) { - struct dim_sample dim_sample; + struct dim_sample dim_sample = {}; struct ena_ring *rx_ring = ena_napi->rx_ring; if (!rx_ring->per_napi_packets) -- 2.27.0