From patchwork Sat Mar 30 18:52:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13611650 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 B664A2E3E5 for ; Sat, 30 Mar 2024 18:53:26 +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=1711824806; cv=none; b=Qe3N8UeSOyVJMD9EnnsmP8JCYT4t+iGn8gNc78gFmWqJ6K1DtGeb/RvPkBu+waclzPnlSgn6Qfr84xrBiYfvREqwjgqBLtw1VOEFnCwuGrwaTl2nRJBIgb8i9UQjIMW/k2BfSjCNezcG+LfPcGyiFjTxaOEoop4gB8ArAD//dJQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711824806; c=relaxed/simple; bh=t+c4BrYzejAt75RJ2Qxn/cvI2ZbHxIHAKbFEFaGQriQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Q8kI5RpTe8rqADevoaBrGdow1YOJLiwc5QWGvS5Yl294K+elBukB61TCtlk7i1QXS6sdkURIAZ80Vd7x4aLi/hobIpTv3yL4tI6xf7yNfeNepDvgnlH3rBU9Xv3wTZ7t6EY7zbv1qZymE+lL1IZNuU1pBeYN66BfUk48n8i/feE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lv2w+yS2; 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="lv2w+yS2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9EEC4C433F1; Sat, 30 Mar 2024 18:53:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711824806; bh=t+c4BrYzejAt75RJ2Qxn/cvI2ZbHxIHAKbFEFaGQriQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lv2w+yS2argUWG6/gjobWEqNWS+BQoiaTWOOZdIulXZyccVv54CWxk4VBTmN6YiZL FmIXs/0t5eNgjIAToFUouVfHho5q1rI3mgZqoIcLcq16an+J7dtP5Bn9/fKnSOvHfo 46S02dVtMQ3RUmtbfHG2/ByJ9ZkDBA2dsi7aq57zJ/WUFDYKmWwjXuJpT47QUwkAI/ S2g+evi7fZuSaOq5JGCvsr2+kc+kBuPz1gtlpam58dj5oP71NeGiv52XogQ4t8wMXw GVf5JzqD6oA2Fx8ImXCiSfwztQbQJc89Oum/zOtOJRzVB19MhrqoGYJC4VeDcB9tPQ Dlw1Hrh/NPk9Q== From: Jonathan Cameron To: linux-iio@vger.kernel.org, =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko Cc: Cosmin Tanislav , Mihail Chindris , Rasmus Villemoes , Tomislav Denis , Marek Vasut , Olivier Moysan , Fabrice Gasnier , Lad Prabhakar , Dmitry Baryshkov , Marijn Suijten , Marius Cristea , Ibrahim Tilki , Jonathan Cameron Subject: [PATCH v6 1/8] iio: adc: mcp3564: Use device_for_each_child_node_scoped() Date: Sat, 30 Mar 2024 18:52:58 +0000 Message-ID: <20240330185305.1319844-2-jic23@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240330185305.1319844-1-jic23@kernel.org> References: <20240330185305.1319844-1-jic23@kernel.org> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Jonathan Cameron Switching to the _scoped() version removes the need for manual calling of fwnode_handle_put() in the paths where the code exits the loop early. In this case that's all in error paths. Cc: Marius Cristea Signed-off-by: Jonathan Cameron --- drivers/iio/adc/mcp3564.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/iio/adc/mcp3564.c b/drivers/iio/adc/mcp3564.c index 311b613b6057..e2ae13f1e842 100644 --- a/drivers/iio/adc/mcp3564.c +++ b/drivers/iio/adc/mcp3564.c @@ -998,7 +998,6 @@ static int mcp3564_parse_fw_children(struct iio_dev *indio_dev) struct mcp3564_state *adc = iio_priv(indio_dev); struct device *dev = &adc->spi->dev; struct iio_chan_spec *channels; - struct fwnode_handle *child; struct iio_chan_spec chanspec = mcp3564_channel_template; struct iio_chan_spec temp_chanspec = mcp3564_temp_channel_template; struct iio_chan_spec burnout_chanspec = mcp3564_burnout_channel_template; @@ -1025,7 +1024,7 @@ static int mcp3564_parse_fw_children(struct iio_dev *indio_dev) if (!channels) return dev_err_probe(dev, -ENOMEM, "Can't allocate memory\n"); - device_for_each_child_node(dev, child) { + device_for_each_child_node_scoped(dev, child) { node_name = fwnode_get_name(child); if (fwnode_property_present(child, "diff-channels")) { @@ -1033,26 +1032,25 @@ static int mcp3564_parse_fw_children(struct iio_dev *indio_dev) "diff-channels", inputs, ARRAY_SIZE(inputs)); + if (ret) + return ret; + chanspec.differential = 1; } else { ret = fwnode_property_read_u32(child, "reg", &inputs[0]); + if (ret) + return ret; chanspec.differential = 0; inputs[1] = MCP3564_AGND; } - if (ret) { - fwnode_handle_put(child); - return ret; - } if (inputs[0] > MCP3564_INTERNAL_VCM || - inputs[1] > MCP3564_INTERNAL_VCM) { - fwnode_handle_put(child); + inputs[1] > MCP3564_INTERNAL_VCM) return dev_err_probe(&indio_dev->dev, -EINVAL, "Channel index > %d, for %s\n", MCP3564_INTERNAL_VCM + 1, node_name); - } chanspec.address = (inputs[0] << 4) | inputs[1]; chanspec.channel = inputs[0];