From patchwork Sat Feb 17 16:42:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13561466 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 E1CCE7D403; Sat, 17 Feb 2024 16:44:35 +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=1708188276; cv=none; b=DN5hJpeWtlRhwNmyz9dNG/CP5Cf9ew0LPRvV7S2aGA5o0t1G7aeOTLtCe6esf+/5KhonBMiOhnE43k3sGsZpzo3jrU0dxJLV5SyHszo651b3OVO/eArmn6d19HOeTONl0pX/tdknT+jU8LdgBKGjuLgykgLFxA8a0kexT7USFsc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708188276; c=relaxed/simple; bh=79c8DCrGZAScdvyIHMIvQJjPXB+eFzdJE93eK/ZtP+w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Drd+5t7L4aCRqe19yLs+prp0HKdCWIdJnp46F45yRzd5suRDj8RbXjv2CYEFkqns0u40ldkgYRjz+3mf8enX6EdvCdmuHkByOj6JWfqqN9//ToUhOlJAx5fTu4KB48V5M3tD4dW09gKY1mH3Cxl7HWOJ5N76XUmNjHjiZNG2+DY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ued95WNs; 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="Ued95WNs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B63EC43390; Sat, 17 Feb 2024 16:44:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708188275; bh=79c8DCrGZAScdvyIHMIvQJjPXB+eFzdJE93eK/ZtP+w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ued95WNsy1SeM7nuVo8E9EIVN+vMLCvjAC5TeM1nIjFmIwKXRmx2r9HlTZG5RNXma 6JcHTm7BncwGuCsrW8hrJEuWUfWBjoP50qQIPUBw7zQ+jpf/MU6wBLIElrIn4WQETB 33CQsG8IvmndEXgTncNJyzK1tYfu95BWLXpK2YHESn1Q5iEkrdOXtOIw56o4ELGoUk 4LZlriMolC1YQViJLhCRfa+NvKvMsj0EY3cy66BNuyvj8tKVAni9+giosYLjhneBM5 vO6M8rYB/pvvRa0RBrXQhlKYlgHz9DnNAt8I8YaWbkQ1Qa9llMs0TUjW+Ja3CgPYwN kJ/cXK/a0jGUA== From: Jonathan Cameron To: linux-iio@vger.kernel.org, "Rafael J . Wysocki" , Len Brown , linux-acpi@vger.kernel.org, Andy Shevchenko , Greg Kroah-Hartman , Daniel Scally , Heikki Krogerus , Sakari Ailus , Julia Lawall Cc: =?utf-8?q?Nuno_S=C3=A1?= , Cosmin Tanislav , Mihail Chindris , Rasmus Villemoes , Tomislav Denis , Marek Vasut , Olivier Moysan , Fabrice Gasnier , Lad Prabhakar , Dmitry Baryshkov , Marijn Suijten , Marius Cristea , Ibrahim Tilki , Peter Zijlstra , Jonathan Cameron Subject: [PATCH v4 15/15] iio: dac: ltc2688: Use device_for_each_child_node_scoped() Date: Sat, 17 Feb 2024 16:42:49 +0000 Message-ID: <20240217164249.921878-16-jic23@kernel.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240217164249.921878-1-jic23@kernel.org> References: <20240217164249.921878-1-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: Nuno Sá Reviewed-by: Andy Shevchenko Signed-off-by: Jonathan Cameron Tested-by: Nuno Sa Reviewed-by: Nuno Sa --- v4: Moved alignment changes back to patch 4. v3: Tweaked the alignment after comments from Andy. drivers/iio/dac/ltc2688.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) diff --git a/drivers/iio/dac/ltc2688.c b/drivers/iio/dac/ltc2688.c index fc8eb53c65be..b71df03fc13b 100644 --- a/drivers/iio/dac/ltc2688.c +++ b/drivers/iio/dac/ltc2688.c @@ -746,26 +746,21 @@ static int ltc2688_span_lookup(const struct ltc2688_state *st, int min, int max) static int ltc2688_channel_config(struct ltc2688_state *st) { struct device *dev = &st->spi->dev; - struct fwnode_handle *child; u32 reg, clk_input, val, tmp[2]; int ret, span; - device_for_each_child_node(dev, child) { + device_for_each_child_node_scoped(dev, child) { struct ltc2688_chan *chan; ret = fwnode_property_read_u32(child, "reg", ®); - if (ret) { - fwnode_handle_put(child); + if (ret) return dev_err_probe(dev, ret, "Failed to get reg property\n"); - } - if (reg >= LTC2688_DAC_CHANNELS) { - fwnode_handle_put(child); + if (reg >= LTC2688_DAC_CHANNELS) return dev_err_probe(dev, -EINVAL, "reg bigger than: %d\n", LTC2688_DAC_CHANNELS); - } val = 0; chan = &st->channels[reg]; @@ -786,12 +781,10 @@ static int ltc2688_channel_config(struct ltc2688_state *st) if (!ret) { span = ltc2688_span_lookup(st, (int)tmp[0] / 1000, tmp[1] / 1000); - if (span < 0) { - fwnode_handle_put(child); + if (span < 0) return dev_err_probe(dev, -EINVAL, "output range not valid:[%d %d]\n", tmp[0], tmp[1]); - } val |= FIELD_PREP(LTC2688_CH_SPAN_MSK, span); } @@ -800,17 +793,14 @@ static int ltc2688_channel_config(struct ltc2688_state *st) &clk_input); if (!ret) { if (clk_input >= LTC2688_CH_TGP_MAX) { - fwnode_handle_put(child); return dev_err_probe(dev, -EINVAL, "toggle-dither-input inv value(%d)\n", clk_input); } ret = ltc2688_tgp_clk_setup(st, chan, child, clk_input); - if (ret) { - fwnode_handle_put(child); + if (ret) return ret; - } /* * 0 means software toggle which is the default mode. @@ -844,11 +834,9 @@ static int ltc2688_channel_config(struct ltc2688_state *st) ret = regmap_write(st->regmap, LTC2688_CMD_CH_SETTING(reg), val); - if (ret) { - fwnode_handle_put(child); + if (ret) return dev_err_probe(dev, -EINVAL, "failed to set chan settings\n"); - } } return 0;