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 83F451868 for ; Wed, 28 Dec 2022 15:22:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6B31C433D2; Wed, 28 Dec 2022 15:22:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672240954; bh=ahkX3g/K1MMp0mk1+59PBxK05Pcv6gYp9EUN8D+oqiI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=u6CXwLMqQuEtctBR5//SZ9kqFAzaQ+EGy7ILKsyOaPT+29Fvew53DA6Cjkg0bdUZs DJeHrrJIDf7A3dg1RaFcgzCplYccYMWYgNVODRMgLfPT7eT2D6TWs6yOERyo/GocTY 0QUXB+G42yDPs77T7YEsj0lXVnIe0n127xKB0YlY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jeff LaBundy , Mattijs Korpershoek , Dmitry Torokhov , Sasha Levin Subject: [PATCH 6.0 0223/1073] Input: iqs7222 - report malformed properties Date: Wed, 28 Dec 2022 15:30:11 +0100 Message-Id: <20221228144334.075477010@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144328.162723588@linuxfoundation.org> References: <20221228144328.162723588@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Jeff LaBundy [ Upstream commit 404f3b48e65f058d94429e4a1ec16a1f82ff3b2f ] Nonzero return values of several calls to fwnode_property_read_u32() are silently ignored, leaving no way to know the properties were not applied in the event of an error. Solve this problem by evaluating fwnode_property_read_u32()'s return value, and reporting an error for any nonzero return value not equal to -EINVAL which indicates the property was absent altogether. Fixes: e505edaedcb9 ("Input: add support for Azoteq IQS7222A/B/C") Signed-off-by: Jeff LaBundy Reviewed-by: Mattijs Korpershoek Link: https://lore.kernel.org/r/Y1SRRrpQXvkETjfm@nixie71 Signed-off-by: Dmitry Torokhov Stable-dep-of: 2f6fd2329789 ("Input: iqs7222 - protect against undefined slider size") Signed-off-by: Sasha Levin --- drivers/input/misc/iqs7222.c | 44 +++++++++++++++++++++++++++++------- 1 file changed, 36 insertions(+), 8 deletions(-) diff --git a/drivers/input/misc/iqs7222.c b/drivers/input/misc/iqs7222.c index 3b6e84689879..350be4f23f50 100644 --- a/drivers/input/misc/iqs7222.c +++ b/drivers/input/misc/iqs7222.c @@ -1807,8 +1807,9 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, chan_setup[0] |= IQS7222_CHAN_SETUP_0_REF_MODE_FOLLOW; chan_setup[4] = val * 42 + 1048; - if (!fwnode_property_read_u32(chan_node, "azoteq,ref-weight", - &val)) { + error = fwnode_property_read_u32(chan_node, "azoteq,ref-weight", + &val); + if (!error) { if (val > U16_MAX) { dev_err(&client->dev, "Invalid %s reference weight: %u\n", @@ -1817,6 +1818,11 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, } chan_setup[5] = val; + } else if (error != -EINVAL) { + dev_err(&client->dev, + "Failed to read %s reference weight: %d\n", + fwnode_get_name(chan_node), error); + return error; } /* @@ -1889,9 +1895,10 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, if (!event_node) continue; - if (!fwnode_property_read_u32(event_node, - "azoteq,timeout-press-ms", - &val)) { + error = fwnode_property_read_u32(event_node, + "azoteq,timeout-press-ms", + &val); + if (!error) { /* * The IQS7222B employs a global pair of press timeout * registers as opposed to channel-specific registers. @@ -1911,6 +1918,12 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, *setup &= ~(U8_MAX << i * 8); *setup |= (val / 500 << i * 8); + } else if (error != -EINVAL) { + dev_err(&client->dev, + "Failed to read %s press timeout: %d\n", + fwnode_get_name(event_node), error); + fwnode_handle_put(event_node); + return error; } error = iqs7222_parse_event(iqs7222, event_node, chan_index, @@ -2009,7 +2022,8 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222, if (fwnode_property_present(sldr_node, "azoteq,use-prox")) sldr_setup[4 + reg_offset] -= 2; - if (!fwnode_property_read_u32(sldr_node, "azoteq,slider-size", &val)) { + error = fwnode_property_read_u32(sldr_node, "azoteq,slider-size", &val); + if (!error) { if (!val || val > dev_desc->sldr_res) { dev_err(&client->dev, "Invalid %s size: %u\n", fwnode_get_name(sldr_node), val); @@ -2023,9 +2037,14 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222, sldr_setup[2] |= (val / 16 << IQS7222_SLDR_SETUP_2_RES_SHIFT); } + } else if (error != -EINVAL) { + dev_err(&client->dev, "Failed to read %s size: %d\n", + fwnode_get_name(sldr_node), error); + return error; } - if (!fwnode_property_read_u32(sldr_node, "azoteq,top-speed", &val)) { + error = fwnode_property_read_u32(sldr_node, "azoteq,top-speed", &val); + if (!error) { if (val > (reg_offset ? U16_MAX : U8_MAX * 4)) { dev_err(&client->dev, "Invalid %s top speed: %u\n", fwnode_get_name(sldr_node), val); @@ -2038,9 +2057,14 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222, sldr_setup[2] &= ~IQS7222_SLDR_SETUP_2_TOP_SPEED_MASK; sldr_setup[2] |= (val / 4); } + } else if (error != -EINVAL) { + dev_err(&client->dev, "Failed to read %s top speed: %d\n", + fwnode_get_name(sldr_node), error); + return error; } - if (!fwnode_property_read_u32(sldr_node, "linux,axis", &val)) { + error = fwnode_property_read_u32(sldr_node, "linux,axis", &val); + if (!error) { u16 sldr_max = sldr_setup[3] - 1; if (!reg_offset) { @@ -2054,6 +2078,10 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222, input_set_abs_params(iqs7222->keypad, val, 0, sldr_max, 0, 0); iqs7222->sl_axis[sldr_index] = val; + } else if (error != -EINVAL) { + dev_err(&client->dev, "Failed to read %s axis: %d\n", + fwnode_get_name(sldr_node), error); + return error; } if (dev_desc->wheel_enable) { -- 2.35.1