From patchwork Fri May 8 05:56:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Jiada" X-Patchwork-Id: 11535535 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E64031668 for ; Fri, 8 May 2020 05:57:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D928321655 for ; Fri, 8 May 2020 05:57:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726638AbgEHF5V (ORCPT ); Fri, 8 May 2020 01:57:21 -0400 Received: from esa3.mentor.iphmx.com ([68.232.137.180]:21956 "EHLO esa3.mentor.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725959AbgEHF5U (ORCPT ); Fri, 8 May 2020 01:57:20 -0400 IronPort-SDR: Bj3cFeI5ujNuwX1zy288hx4QTHrCXeu3nCcqd5uNGox+5iYmAufqkEbtPV8+oBlcKbG0iaolTr wKudc70OCUyYzBPCtj1Sntbyl8uT0gkBdAWACjSJ05zkGhJQnmbBV34twcGNgQfShkvGRJUYj4 zuAY/LVN3zyMFxTq277HW0/YeMA3tTwpEK+mhCWq9XadK8/uUcBNpiLYKUuLhWjBXApypjHZcx 1gKpGDRiewBKrQ0n2c+wBly4ACOrQPn+tY3K7xP+5ta34FJJsOgpylkdLlFy3pkV+LtF/4XcE/ wrQ= X-IronPort-AV: E=Sophos;i="5.73,366,1583222400"; d="scan'208";a="48651895" Received: from orw-gwy-02-in.mentorg.com ([192.94.38.167]) by esa3.mentor.iphmx.com with ESMTP; 07 May 2020 21:57:09 -0800 IronPort-SDR: ScQYVxevlcnWS3PmzMoFzT/bfanTRKGYao6fRJJ/RgwmdpFgplxLawlcA387LsMIbrKThslncX TYqEBOVkG1WAwGPNCI6IOwla4Z+jYRgBwDOZaboPSYhh4wf7OkSFzuvYH0lEaMFmS4X6xcIwLi IwkofgY62PP3geyJqwFxuJKVKufJrfGRSwmwAfEclzgbcB1UBsALW6AS0DTQ1SY4d+RhX/V9rh F7yoEY8ykNdqU09zKaCLR+2M6x8djZOSCiwj3zvxC9XijaXJ6krZRAxKDit4l328M7oSbQvIJH dk4= From: Jiada Wang To: , , , , CC: , , , , Subject: [PATCH v11 02/56] Input: atmel_mxt_ts - rework sysfs init/remove Date: Thu, 7 May 2020 22:56:02 -0700 Message-ID: <20200508055656.96389-3-jiada_wang@mentor.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200508055656.96389-1-jiada_wang@mentor.com> References: <20200508055656.96389-1-jiada_wang@mentor.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Nick Dyer An error in the sysfs init may otherwise interfere with the async return from the firmware loader Signed-off-by: Nick Dyer (cherry picked from ndyer/linux/for-upstream commit 3114584ae77c2b03b6dad87174f010d002e9c05d) [gdavis: Forward port and fixup conflicts. Also fixed sysfs leaks in both the mxt_initialize() and mxt_probe() error return cases.] Signed-off-by: George G. Davis [jiada: keep call mxt_initialize() before sysfs creation replace S_IWUSR with 0200] Signed-off-by: Jiada Wang --- drivers/input/touchscreen/atmel_mxt_ts.c | 64 +++++++++++++++++++----- 1 file changed, 52 insertions(+), 12 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index a2189739e30f..49bdf5cf3a0d 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -2086,10 +2086,14 @@ static int mxt_initialize_input_device(struct mxt_data *data) return 0; err_free_mem: + data->input_dev = NULL; input_free_device(input_dev); return error; } +static int mxt_sysfs_init(struct mxt_data *data); +static void mxt_sysfs_remove(struct mxt_data *data); + static int mxt_configure_objects(struct mxt_data *data, const struct firmware *cfg); @@ -2141,16 +2145,24 @@ static int mxt_initialize(struct mxt_data *data) if (error) return error; + error = mxt_sysfs_init(data); + if (error) + return error; + error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME, &client->dev, GFP_KERNEL, data, mxt_config_cb); if (error) { dev_err(&client->dev, "Failed to invoke firmware loader: %d\n", error); - return error; + goto err_free_sysfs; } return 0; + +err_free_sysfs: + mxt_sysfs_remove(data); + return error; } static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep) @@ -2803,6 +2815,7 @@ static int mxt_load_fw(struct device *dev, const char *fn) if (ret) goto release_firmware; + mxt_sysfs_remove(data); mxt_free_input_device(data); mxt_free_object_table(data); } else { @@ -2909,16 +2922,25 @@ static ssize_t mxt_update_fw_store(struct device *dev, return count; } +static DEVICE_ATTR(update_fw, 0200, NULL, mxt_update_fw_store); + +static struct attribute *mxt_fw_attrs[] = { + &dev_attr_update_fw.attr, + NULL +}; + +static const struct attribute_group mxt_fw_attr_group = { + .attrs = mxt_fw_attrs, +}; + static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); -static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); static struct attribute *mxt_attrs[] = { &dev_attr_fw_version.attr, &dev_attr_hw_version.attr, &dev_attr_object.attr, - &dev_attr_update_fw.attr, NULL }; @@ -2926,6 +2948,28 @@ static const struct attribute_group mxt_attr_group = { .attrs = mxt_attrs, }; +static int mxt_sysfs_init(struct mxt_data *data) +{ + struct i2c_client *client = data->client; + int error; + + error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); + if (error) { + dev_err(&client->dev, "Failure %d creating sysfs group\n", + error); + return error; + } + + return 0; +} + +static void mxt_sysfs_remove(struct mxt_data *data) +{ + struct i2c_client *client = data->client; + + sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); +} + static void mxt_start(struct mxt_data *data) { switch (data->suspend_mode) { @@ -3112,19 +3156,14 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) if (error) return error; - error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); + error = sysfs_create_group(&client->dev.kobj, &mxt_fw_attr_group); if (error) { - dev_err(&client->dev, "Failure %d creating sysfs group\n", + dev_err(&client->dev, "Failure %d creating fw sysfs group\n", error); - goto err_free_object; + return error; } return 0; - -err_free_object: - mxt_free_input_device(data); - mxt_free_object_table(data); - return error; } static int mxt_remove(struct i2c_client *client) @@ -3132,7 +3171,8 @@ static int mxt_remove(struct i2c_client *client) struct mxt_data *data = i2c_get_clientdata(client); disable_irq(data->irq); - sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); + sysfs_remove_group(&client->dev.kobj, &mxt_fw_attr_group); + mxt_sysfs_remove(data); mxt_free_input_device(data); mxt_free_object_table(data);