From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 654E021D2A0; Wed, 25 Sep 2024 12:14:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727266469; cv=none; b=uzs51kafzdcgHPgCK1IoJZN2kjFRhwdmTMekEprlqxneDlgsxpprUiTpo4ekmpeb37L4ozNC+VYt7pbZN+cgnYUcgpHukIoCkCIdj15hVvg/ItroG9zHjNJgL4HKVVlBo2Lt5VnDvmy7PHrrwhpH38zG+4Z0gXg0hKlTJYdKx7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727266469; c=relaxed/simple; bh=lkXxB/YjIjrqCNz9gdjyXC7KTuV69ONi+VaZy64n8X0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=H4lo9/PqMT3V24+mLm0YmI/vPU9bPKJR/IZlzzywak0d+PssAqpRM9+8kCGX3s3KvxdYJml5BGVLz3sZ0D8/xQKmP2B1r0yIGCpvnhlGZMWNKZzthcIVSfJ+Sv18S4sjj7k2XkIlGPAmvVKN3RCLV2CGmEFSdonY5wFcIWsovrw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=vBidSwdY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="vBidSwdY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8191EC4CEC7; Wed, 25 Sep 2024 12:14:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727266469; bh=lkXxB/YjIjrqCNz9gdjyXC7KTuV69ONi+VaZy64n8X0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vBidSwdYLvYCcse3meUylnZ/947QXbqmUbx6g3msRjDoyNbUHdajIO4YAbaGnvBgP 6lxtOP9GIp1gyE8ciJR9L9dgNT7CiIKmNKYtYUW1nTLesULnna2Jp4UdSusgFePq3x UB51YuN/9y3M2QI5NJ0YO47y9Z3yx/HJ/iTVpdmjLJsznfu9M7orNUJF4SYawHjekh ihNf1TmEyZGhyLOvFi6isjD2wmL3Bgu1H7Wu8tmgn3EIWgHHprGU25Tdl+d3fefOeY Yr33QwAPuOTKOZvHeKRyg6qX69aizjOSc0UOw5PMyfiULrbmprpcRKnBDG7ecn92Xl fxOS+NULqYbgg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Krzysztof Kozlowski , Mark Brown , Sasha Levin , srinivas.kandagatla@linaro.org, lgirdwood@gmail.com, perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org, linux-arm-msm@vger.kernel.org, linux-sound@vger.kernel.org Subject: [PATCH AUTOSEL 6.6 063/139] ASoC: codecs: wsa883x: Handle reading version failure Date: Wed, 25 Sep 2024 08:08:03 -0400 Message-ID: <20240925121137.1307574-63-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240925121137.1307574-1-sashal@kernel.org> References: <20240925121137.1307574-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.52 Content-Transfer-Encoding: 8bit From: Krzysztof Kozlowski [ Upstream commit 2fbf16992e5aa14acf0441320033a01a32309ded ] If reading version and variant from registers fails (which is unlikely but possible, because it is a read over bus), the driver will proceed and perform device configuration based on uninitialized stack variables. Handle it a bit better - bail out without doing any init and failing the update status Soundwire callback. Signed-off-by: Krzysztof Kozlowski Link: https://patch.msgid.link/20240710-asoc-wsa88xx-version-v1-2-f1c54966ccde@linaro.org Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/codecs/wsa883x.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/sound/soc/codecs/wsa883x.c b/sound/soc/codecs/wsa883x.c index 2169d93989841..1831d4487ba9d 100644 --- a/sound/soc/codecs/wsa883x.c +++ b/sound/soc/codecs/wsa883x.c @@ -998,15 +998,19 @@ static const struct reg_sequence reg_init[] = { {WSA883X_GMAMP_SUP1, 0xE2}, }; -static void wsa883x_init(struct wsa883x_priv *wsa883x) +static int wsa883x_init(struct wsa883x_priv *wsa883x) { struct regmap *regmap = wsa883x->regmap; - int variant, version; + int variant, version, ret; - regmap_read(regmap, WSA883X_OTP_REG_0, &variant); + ret = regmap_read(regmap, WSA883X_OTP_REG_0, &variant); + if (ret) + return ret; wsa883x->variant = variant & WSA883X_ID_MASK; - regmap_read(regmap, WSA883X_CHIP_ID0, &version); + ret = regmap_read(regmap, WSA883X_CHIP_ID0, &version); + if (ret) + return ret; wsa883x->version = version; switch (wsa883x->variant) { @@ -1041,6 +1045,8 @@ static void wsa883x_init(struct wsa883x_priv *wsa883x) WSA883X_DRE_OFFSET_MASK, wsa883x->comp_offset); } + + return 0; } static int wsa883x_update_status(struct sdw_slave *slave, @@ -1049,7 +1055,7 @@ static int wsa883x_update_status(struct sdw_slave *slave, struct wsa883x_priv *wsa883x = dev_get_drvdata(&slave->dev); if (status == SDW_SLAVE_ATTACHED && slave->dev_num > 0) - wsa883x_init(wsa883x); + return wsa883x_init(wsa883x); return 0; } -- 2.43.0