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From: Jiada Wang <jiada_wang@mentor.com>
To: <nick@shmanahar.org>, <dmitry.torokhov@gmail.com>,
	<jikos@kernel.org>, <benjamin.tissoires@redhat.com>,
	<bsz@semihalf.com>, <rydberg@bitmath.org>
Cc: <linux-input@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<erosca@de.adit-jv.com>, <Andrew_Gabbasov@mentor.com>,
	<jiada_wang@mentor.com>
Subject: [PATCH v9 02/55] Input: atmel_mxt_ts - rework sysfs init/remove
Date: Wed, 25 Mar 2020 06:32:41 -0700	[thread overview]
Message-ID: <20200325133334.19346-3-jiada_wang@mentor.com> (raw)
In-Reply-To: <20200325133334.19346-1-jiada_wang@mentor.com>

From: Nick Dyer <nick.dyer@itdev.co.uk>

An error in the sysfs init may otherwise interfere with the async return
from the firmware loader

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
(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 <george_davis@mentor.com>
[jiada: keep call mxt_initialize() before sysfs creation
	replace S_IWUSR with 0200]
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
 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);
 
-- 
2.17.1


  parent reply	other threads:[~2020-03-25 13:33 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-25 13:32 [PATCH v9 00/55] atmel_mxt_ts misc Jiada Wang
2020-03-25 13:32 ` [PATCH v9 01/55] Input: introduce input_mt_report_slot_inactive Jiada Wang
2020-03-25 13:32 ` Jiada Wang [this message]
2020-03-25 13:32 ` [PATCH v9 03/55] Input: atmel_mxt_ts - only read messages in mxt_acquire_irq() when necessary Jiada Wang
2020-03-25 13:32 ` [PATCH v9 04/55] Input: atmel_mxt_ts - split large i2c transfers into blocks Jiada Wang
2020-03-25 13:32 ` [PATCH v9 05/55] Input: atmel_mxt_ts - output status from T48 Noise Supression Jiada Wang
2020-03-25 13:32 ` [PATCH v9 06/55] Input: atmel_mxt_ts - output status from T42 Touch Suppression Jiada Wang
2020-03-25 13:32 ` [PATCH v9 07/55] Input: atmel_mxt_ts - implement T9 vector/orientation support Jiada Wang
2020-03-25 13:32 ` [PATCH v9 08/55] Input: atmel_mxt_ts - implement T15 Key Array support Jiada Wang
2020-03-25 13:32 ` [PATCH v9 09/55] Input: atmel_mxt_ts - handle reports from T47 Stylus object Jiada Wang
2020-03-25 13:32 ` [PATCH v9 10/55] Input: atmel_mxt_ts - implement support for T107 active stylus Jiada Wang
2020-03-25 13:32 ` [PATCH v9 11/55] Input: atmel_mxt_ts - add debug for T92 gesture and T93 touch seq msgs Jiada Wang
2020-03-25 13:32 ` [PATCH v9 12/55] Input: atmel_mxt_ts - release touch state during suspend Jiada Wang
2020-03-25 13:32 ` [PATCH v9 13/55] Input: atmel_mxt_ts - add regulator control support Jiada Wang
2020-03-25 19:05   ` Dmitry Osipenko
2020-03-27 11:09     ` Wang, Jiada
2020-03-29 18:54       ` Dmitry Osipenko
2020-03-30  4:10         ` Wang, Jiada
2020-03-25 13:32 ` [PATCH v9 14/55] dt-bindings: input: atmel: add suspend mode support Jiada Wang
2020-03-25 13:32 ` [PATCH v9 15/55] Input: atmel_mxt_ts - report failures in suspend/resume Jiada Wang
2020-03-25 13:32 ` [PATCH v9 16/55] Input: atmel_mxt_ts - allow specification of firmware file name Jiada Wang
2020-03-25 13:32 ` [PATCH v9 17/55] Input: atmel_mxt_ts: Rename mxt_fw_version_show to fw_version_show Jiada Wang
2020-03-25 13:32 ` [PATCH v9 18/55] Input: atmel_mxt_ts: Rename mxt_hw_version_show to hw_version_show Jiada Wang
2020-03-25 13:32 ` [PATCH v9 19/55] Input: atmel_mxt_ts: rename mxt_update_fw_store to update_fw_store Jiada Wang
2020-03-25 13:32 ` [PATCH v9 20/55] Input: atmel_mxt_ts - handle cfg filename via pdata/sysfs Jiada Wang
2020-03-25 13:33 ` [PATCH v9 21/55] dt-bindings: input: atmel: provide name of configuration file Jiada Wang
2020-03-25 13:33 ` [PATCH v9 22/55] Input: atmel_mxt_ts - allow input name to be specified in platform data Jiada Wang
2020-03-25 13:33 ` [PATCH v9 23/55] dt-bindings: input: atmel: support to specify input name Jiada Wang
2020-03-25 13:33 ` [PATCH v9 24/55] Input: atmel_mxt_ts - add config checksum attribute to sysfs Jiada Wang
2020-03-25 13:33 ` [PATCH v9 25/55] Input: atmel_mxt_ts - refactor firmware flash to extract context into struct Jiada Wang
2020-03-25 13:33 ` [PATCH v9 26/55] Input: atmel_mxt_ts - refactor code to enter bootloader into separate func Jiada Wang
2020-03-25 13:33 ` [PATCH v9 27/55] Input: atmel_mxt_ts - combine bootloader version query with probe Jiada Wang
2020-03-25 13:33 ` [PATCH v9 28/55] Input: atmel_mxt_ts - improve bootloader state machine handling Jiada Wang
2020-03-25 13:33 ` [PATCH v9 29/55] Input: atmel_mxt_ts - rename bl_completion to chg_completion Jiada Wang
2020-03-25 13:33 ` [PATCH v9 30/55] Input: atmel_mxt_ts - make bootloader interrupt driven Jiada Wang
2020-03-25 13:33 ` [PATCH v9 31/55] Input: atmel_mxt_ts - delay enabling IRQ when not using regulators Jiada Wang
2020-03-25 13:33 ` [PATCH v9 32/55] Input: atmel_mxt_ts - implement I2C retries Jiada Wang
2020-03-25 13:33 ` [PATCH v9 33/55] Input: atmel_mxt_ts - orientation is not present in hover Jiada Wang
2020-03-25 13:33 ` [PATCH v9 34/55] Input: atmel_mxt_ts - implement debug output for messages Jiada Wang
2020-03-25 13:33 ` [PATCH v9 35/55] Input: atmel_mxt_ts - implement improved debug message interface Jiada Wang
2020-03-25 13:33 ` [PATCH v9 36/55] Input: atmel_mxt_ts - eliminate data->raw_info_block Jiada Wang
2020-03-25 13:33 ` [PATCH v9 37/55] Input: atmel_mxt_ts - Change call-points of mxt_free_* functions Jiada Wang
2020-03-25 13:33 ` [PATCH v9 38/55] Input: atmel_mxt_ts - rely on calculated_crc rather than file config_crc Jiada Wang
2020-03-25 13:33 ` [PATCH v9 39/55] input: atmel_mxt_ts: export GPIO reset line via sysfs Jiada Wang
2020-03-25 13:33 ` [PATCH v9 40/55] input: atmel_mxt_ts: Add Missing Delay for reset handling of Atmel touch panel controller in detachable displays Jiada Wang
2020-03-25 13:33 ` [PATCH v9 41/55] Input: atmel_mxt_ts: Add support for run self-test routine Jiada Wang
2020-03-25 13:33 ` [PATCH v9 42/55] Input: atmel_mxt_ts: Limit the max bytes transferred in an i2c transaction Jiada Wang
2020-03-25 13:33 ` [PATCH v9 43/55] dt-bindings: input: atmel: support to set max bytes transferred Jiada Wang
2020-03-25 13:33 ` [PATCH v9 44/55] Input: atmel_mxt_ts: return error from mxt_process_messages_until_invalid() Jiada Wang
2020-03-25 13:33 ` [PATCH v9 45/55] Input: Atmel: improve error handling in mxt_start() Jiada Wang
2020-03-25 13:33 ` [PATCH v9 46/55] Input: Atmel: improve error handling in mxt_initialize() Jiada Wang
2020-03-25 13:33 ` [PATCH v9 47/55] Input: Atmel: improve error handling in mxt_update_cfg() Jiada Wang
2020-03-25 13:33 ` [PATCH v9 48/55] Input: Atmel: Improve error handling in mxt_initialize_input_device() Jiada Wang
2020-03-25 13:33 ` [PATCH v9 49/55] Input: Atmel: handle ReportID "0x00" while processing T5 messages Jiada Wang
2020-03-25 13:33 ` [PATCH v9 50/55] Input: Atmel: use T44 object to process " Jiada Wang
2020-03-25 13:33 ` [PATCH v9 51/55] Input: atmel_mxt_ts: use gpiod_set_value_cansleep for reset pin Jiada Wang
2020-03-25 13:33 ` [PATCH v9 52/55] input: touchscreen: atmel_mxt_ts: Added sysfs entry for touchscreen status Jiada Wang
2020-03-25 19:35   ` Dmitry Osipenko
2020-03-25 19:41     ` Dmitry Osipenko
2020-03-27 12:49     ` Wang, Jiada
2020-03-27 13:37       ` Dmitry Osipenko
2020-03-27 13:43         ` Dmitry Osipenko
2020-03-25 13:33 ` [PATCH v9 53/55] input: atmel_mxt_ts: added sysfs interface to update atmel T38 data Jiada Wang
2020-03-25 13:33 ` [PATCH v9 54/55] Input: atmel_mxt_ts: Implement synchronization during various operation Jiada Wang
2020-03-25 13:33 ` [PATCH v9 55/55] Input: atmel_mxt_ts - Fix compilation warning Jiada Wang

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