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[75.142.250.213]) by smtp.gmail.com with ESMTPSA id 1sm1477180qka.52.2021.04.30.07.21.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Apr 2021 07:21:21 -0700 (PDT) From: trix@redhat.com To: srinivas.kandagatla@linaro.org, bgoswami@codeaurora.org, lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com Subject: [PATCH v2] ASoC: codecs: lpass-wsa-macro: handle unexpected input Date: Fri, 30 Apr 2021 07:21:17 -0700 Message-Id: <20210430142117.3272772-1-trix@redhat.com> X-Mailer: git-send-email 2.26.3 MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=trix@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Cc: Tom Rix , alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Tom Rix Static analysis reports this problem lpass-wsa-macro.c:1732:6: warning: Array subscript is undefined if (wsa->ec_hq[ec_tx]) { ^~~~~~~~~~~~~~~~~ The happens because 'ec_tx' is never initialized and there is no default in switch statement that sets ec_tx. Add a default case that returns an error before the array is accessed. Signed-off-by: Tom Rix --- v2: - handle the input error, keep switch --- sound/soc/codecs/lpass-wsa-macro.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/soc/codecs/lpass-wsa-macro.c b/sound/soc/codecs/lpass-wsa-macro.c index 1a7fa5492f28..d3ac318fd6b6 100644 --- a/sound/soc/codecs/lpass-wsa-macro.c +++ b/sound/soc/codecs/lpass-wsa-macro.c @@ -1727,6 +1727,10 @@ static int wsa_macro_enable_echo(struct snd_soc_dapm_widget *w, val = val & CDC_WSA_RX_MIX_TX1_SEL_MASK; ec_tx = (val >> CDC_WSA_RX_MIX_TX1_SEL_SHFT) - 1; break; + default: + dev_err(component->dev, "%s: Invalid shift %u\n", + __func__, w->shift); + return -EINVAL; } if (wsa->ec_hq[ec_tx]) {