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[34.150.157.240]) by smtp.gmail.com with ESMTPSA id dz11-20020ad4588b000000b0068c493426edsm566640qvb.104.2024.01.28.08.14.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 28 Jan 2024 08:14:03 -0800 (PST) From: Ricardo Ribalda Date: Sun, 28 Jan 2024 16:13:57 +0000 Subject: [PATCH 2/2] media: usb: s2255: Refactor s2255_get_fx2fw Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240128-gcc-11-warnings-v1-2-52bbdf492049@chromium.org> References: <20240128-gcc-11-warnings-v1-0-52bbdf492049@chromium.org> In-Reply-To: <20240128-gcc-11-warnings-v1-0-52bbdf492049@chromium.org> To: Laurent Pinchart , Mauro Carvalho Chehab , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team Cc: linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.12.3 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1789352427690870896 X-GMAIL-MSGID: 1789352427690870896 Resize the buffer to the actual size needed and initialize it. With this we can convince gcc-11 that the variable is not used uninitialized. drivers/media/usb/s2255/s2255drv.c:1914:25: warning: 'transBuffer' may be used uninitialized [-Wmaybe-uninitialized] Signed-off-by: Ricardo Ribalda --- drivers/media/usb/s2255/s2255drv.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/media/usb/s2255/s2255drv.c b/drivers/media/usb/s2255/s2255drv.c index 3c2627712fe9..8e1de1e8bd12 100644 --- a/drivers/media/usb/s2255/s2255drv.c +++ b/drivers/media/usb/s2255/s2255drv.c @@ -1906,9 +1906,10 @@ static int s2255_get_fx2fw(struct s2255_dev *dev) { int fw; int ret; - unsigned char transBuffer[64]; - ret = s2255_vendor_req(dev, S2255_VR_FW, 0, 0, transBuffer, 2, - S2255_VR_IN); + u8 transBuffer[2] = {}; + + ret = s2255_vendor_req(dev, S2255_VR_FW, 0, 0, transBuffer, + sizeof(transBuffer), S2255_VR_IN); if (ret < 0) dprintk(dev, 2, "get fw error: %x\n", ret); fw = transBuffer[0] + (transBuffer[1] << 8);