From nobody Tue Nov 26 01:55:25 2024 Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 547941C9ECC; Tue, 22 Oct 2024 19:09:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729624191; cv=none; b=rXv/wTZElBUf457NOZ+RwanCc7DwmE4tQxF0ynEympHL08MW/rqGyEBOg1qxaWRaH0BVOTG7i6zL0JBxsXnFvJ18tK2wFeS14awV91CX4X+cKC7BrzKLLRERo5GETbWG0OasQ5R51oV5u3V2vdvW41ai2w41m6lxAsKPaNQ+NKE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729624191; c=relaxed/simple; bh=9zctTZ6P1xbSfCpd3RZa8VzNmlfswd76EAkAS+SpkxA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=EHK+XO4rpH5TjD9Q4OBFhAL0fK43yhTZy2/OoYhwhR/6+sI6UvBPrHjIIDo5VwOcnrVLcXfQT2GsyTBL7dysz+rQKU7g5UkM9a4vYH8Yz2BbZ0gObf/91M6JiHNs89P+9atlT3bkMCBaEnXp3q/MQxm4GhbtIkH+R9qnIVBoOgY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=FnsnYa7s; arc=none smtp.client-ip=209.85.214.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FnsnYa7s" Received: by mail-pl1-f171.google.com with SMTP id d9443c01a7336-20ce65c8e13so51514795ad.1; Tue, 22 Oct 2024 12:09:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729624190; x=1730228990; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=6PiELke4NP4639bcqP6jdKFk2y5EnGjLKhntCyBZQV0=; b=FnsnYa7sOOn26ymCFpF8g3Zc53zblCc62Fv2PobZnldoz/m2su2UzFtavcm41eblb3 RSr2aUmw7dvUMMsz14EP4uPb4D08SOdeOGwo6DYbLwMCeRgspSZbaml5AYpSngeYQ2L1 UtMV5XBckbw91rbNaXebuUtjEDPjGaqmL1uJTk+1QUkdMjyQLKmdSyzeVJgVMO/0qoh8 Fy4cgCydWktbRP+VaGnXvmijN4ODWBvMgo4kLsJ5v7adHvYlC/SF1xxzRV/RfWU21E0P UmVOvLdEoRqO1Uzj3MIXh6OpGBq7ZcHabxbb+uoeZvl0xq1xevNvK4V0N0WTW6ZCrR2G KMhQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729624190; x=1730228990; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=6PiELke4NP4639bcqP6jdKFk2y5EnGjLKhntCyBZQV0=; b=GudNXrabb1CTuYVjZpSQLS5vyep3Ky96OfDGIgFli/wZPbGwk/7NqGFrPP2alLdSpM XdNx+Q+ih4YfNqpAu4pGNU4UbN6L01JxDsFoVF9cEQO1XY0It7Ed7CMVcgAMiIr75tBT JMbMAR0s5qYs60rnh9yuhuhnRJq/yqyxIhTyWxzSliQXDk6NyW6ufM8r5laVYzJ7elOO wbUE1PiFPb03PotTp3/x8tmFdi60xse9KJJY69DGz4MVp556CWTLLnpnxerEdh2KsMzx p6qmHXMGJGcs99tajRASchBHG+U/UaFPyowENpoNug+UlwUxZbvGNm+IENyUyMzHwYuS QuaA== X-Forwarded-Encrypted: i=1; AJvYcCVX5xSzaLT+LocVMlBwSN2BEQXAmeCZtLCnmEkThsKISB/cnqmdX5qRmZOLnH/IYopjIOBPCgFiqSo=@vger.kernel.org, AJvYcCXp4/qDy600oOV1Mz60w/szqFgJTcg6KGxyhjh0R2TpjWwNyWN02O58ZQtzpqLNAnFozF+ObhzoSeUuO1b+@vger.kernel.org X-Gm-Message-State: AOJu0YwqfCm1tUEdh9oz2SXud3osK2LCwD9w8d8usU/dz2RXaaWK2qEN vgd215ByPhLRrTK1LWudeaQ1Uwm1HD5Hn+Gg8aIbfjRiTHqsvy/g X-Google-Smtp-Source: AGHT+IHzefAKr3YmXodU0Tw/AMU21AhRkwq33vN9l2SvR4Ry6fh6LPhGDPlRLZOMnwSyAwD+nR8KUw== X-Received: by 2002:a17:902:f68a:b0:20c:80d9:9982 with SMTP id d9443c01a7336-20fa9eb9761mr1885675ad.47.1729624189699; Tue, 22 Oct 2024 12:09:49 -0700 (PDT) Received: from purva-IdeaPad-Gaming-3-15IHU6.lan ([2409:40c0:229:10e9:fbeb:f79a:19dc:62a2]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20e7eee6538sm45996275ad.47.2024.10.22.12.09.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Oct 2024 12:09:48 -0700 (PDT) From: Suraj Sonawane To: tharunkumar.pasumarthi@microchip.com, kumaravel.thiagarajan@microchip.com Cc: UNGLinuxDriver@microchip.com, andi.shyti@kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, Suraj Sonawane Subject: [PATCH] i2c: busses: fix uninit-value in pci1xxxx_i2c_xfer Date: Wed, 23 Oct 2024 00:38:45 +0530 Message-Id: <20241022190845.23536-1-surajsonawane0215@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Fix an issue reported by the smatch static analysis tool: drivers/i2c/busses/i2c-mchp-pci1xxxx.c:1030 pci1xxxx_i2c_xfer() error: uninitialized symbol 'retval'. The error occurs because retval may be used without being set if the transfer loop does not execute (e.g., when num is 0). This could cause the function to return an undefined value, leading to unpredictable behavior. Initialize retval to 0 before the transfer loop to ensure that the function returns a valid value even if no transfers are processed. This change also preserves proper error handling within the loop. Signed-off-by: Suraj Sonawane --- drivers/i2c/busses/i2c-mchp-pci1xxxx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-mchp-pci1xxxx.c b/drivers/i2c/busses/i2= c-mchp-pci1xxxx.c index 5ef136c3e..4dfa11650 100644 --- a/drivers/i2c/busses/i2c-mchp-pci1xxxx.c +++ b/drivers/i2c/busses/i2c-mchp-pci1xxxx.c @@ -994,7 +994,7 @@ static int pci1xxxx_i2c_xfer(struct i2c_adapter *adap, { struct pci1xxxx_i2c *i2c =3D i2c_get_adapdata(adap); u8 slaveaddr; - int retval; + int retval =3D 0; u32 i; =20 i2c->i2c_xfer_in_progress =3D true; --=20 2.34.1