From patchwork Wed May 4 16:44:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 569808 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6CF9FC4167E for ; Wed, 4 May 2022 17:02:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355114AbiEDRGD (ORCPT ); Wed, 4 May 2022 13:06:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355636AbiEDREc (ORCPT ); Wed, 4 May 2022 13:04:32 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E1534EF56; Wed, 4 May 2022 09:53:11 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id B2AADCE2625; Wed, 4 May 2022 16:53:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0E34C385AA; Wed, 4 May 2022 16:53:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1651683185; bh=5kiyZl3wv3CTm+GFIfjJaXI1i53KPSbQgo/RAbnYu2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D52dfDCfgM3wYuA8iPCosUgc8zTF1W29/JlRiVyPt81MPNtxS4ObFNyQTZW8Uvue0 JbaX7w6tQhqo0XGSYZu2/8LHYDAYqpqaWoS/OLnP97LngLVdYq7YEdZQLyC5+iLC1e 0wypQ+YmLSLDvpWHPzOlwEObJuS+QfG9kIXKVr2E= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andy Shevchenko , Tong Zhang , Jonathan Cameron , Sasha Levin Subject: [PATCH 5.15 050/177] iio:imu:bmi160: disable regulator in error path Date: Wed, 4 May 2022 18:44:03 +0200 Message-Id: <20220504153057.485932494@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220504153053.873100034@linuxfoundation.org> References: <20220504153053.873100034@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tong Zhang [ Upstream commit d926054d5565d3cfa2c7c3f7a48e79bcc10453ed ] Regulator should be disabled in error path as mentioned in _regulator_put(). Also disable accel if gyro cannot be enabled. [ 16.233604] WARNING: CPU: 0 PID: 2177 at drivers/regulator/core.c:2257 _regulator_put [ 16.240453] Call Trace: [ 16.240572] [ 16.240676] regulator_put+0x26/0x40 [ 16.240853] regulator_bulk_free+0x26/0x50 [ 16.241050] release_nodes+0x3f/0x70 [ 16.241225] devres_release_group+0x147/0x1c0 [ 16.241441] ? bmi160_core_probe+0x175/0x3a0 [bmi160_core] Fixes: 5dea3fb066f0 ("iio: imu: bmi160: added regulator support") Reviewed-by: Andy Shevchenko Signed-off-by: Tong Zhang Link: https://lore.kernel.org/r/20220327154005.806049-1-ztong0001@gmail.com Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/imu/bmi160/bmi160_core.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c index 824b5124a5f5..01336105792e 100644 --- a/drivers/iio/imu/bmi160/bmi160_core.c +++ b/drivers/iio/imu/bmi160/bmi160_core.c @@ -730,7 +730,7 @@ static int bmi160_chip_init(struct bmi160_data *data, bool use_spi) ret = regmap_write(data->regmap, BMI160_REG_CMD, BMI160_CMD_SOFTRESET); if (ret) - return ret; + goto disable_regulator; usleep_range(BMI160_SOFTRESET_USLEEP, BMI160_SOFTRESET_USLEEP + 1); @@ -741,29 +741,37 @@ static int bmi160_chip_init(struct bmi160_data *data, bool use_spi) if (use_spi) { ret = regmap_read(data->regmap, BMI160_REG_DUMMY, &val); if (ret) - return ret; + goto disable_regulator; } ret = regmap_read(data->regmap, BMI160_REG_CHIP_ID, &val); if (ret) { dev_err(dev, "Error reading chip id\n"); - return ret; + goto disable_regulator; } if (val != BMI160_CHIP_ID_VAL) { dev_err(dev, "Wrong chip id, got %x expected %x\n", val, BMI160_CHIP_ID_VAL); - return -ENODEV; + ret = -ENODEV; + goto disable_regulator; } ret = bmi160_set_mode(data, BMI160_ACCEL, true); if (ret) - return ret; + goto disable_regulator; ret = bmi160_set_mode(data, BMI160_GYRO, true); if (ret) - return ret; + goto disable_accel; return 0; + +disable_accel: + bmi160_set_mode(data, BMI160_ACCEL, false); + +disable_regulator: + regulator_bulk_disable(ARRAY_SIZE(data->supplies), data->supplies); + return ret; } static int bmi160_data_rdy_trigger_set_state(struct iio_trigger *trig,