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input: touchscreen: Handle failure case in Atmel driver

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Handle file already exists and failure case separately.

Change-Id: I0c8004c88feb323b592ad8f622f86fe66cb63006
Signed-off-by: Venkata Prahlad Valluru <vvalluru@codeaurora.org>
This commit is contained in:
Venkata Prahlad Valluru 2018-03-13 15:47:23 +05:30
parent a337c17ceb
commit 6feaa135ad
1 changed files with 16 additions and 5 deletions
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21
drivers/input/touchscreen/atmel_maxtouch_ts.c
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@ -1,7 +1,7 @@
/*
* Atmel maXTouch Touchscreen driver
*
* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
* Copyright (c) 2014-2015, 2018 The Linux Foundation. All rights reserved.
*
* Linux foundation chooses to take subject only to the GPLv2 license terms,
* and distributes only under these terms.
@ -529,6 +529,8 @@ static ssize_t mxt_debug_msg_read(struct file *filp, struct kobject *kobj,
static int mxt_debug_msg_init(struct mxt_data *data)
{
int ret;
sysfs_bin_attr_init(&data->debug_msg_attr);
data->debug_msg_attr.attr.name = "debug_msg";
data->debug_msg_attr.attr.mode = 0666;
@ -536,11 +538,20 @@ static int mxt_debug_msg_init(struct mxt_data *data)
data->debug_msg_attr.write = mxt_debug_msg_write;
data->debug_msg_attr.size = data->T5_msg_size * DEBUG_MSG_MAX;
if (sysfs_create_bin_file(&data->client->dev.kobj,
&data->debug_msg_attr) < 0)
dev_info(&data->client->dev, "Debugfs already exists\n");
ret = sysfs_create_bin_file(&data->client->dev.kobj,
&data->debug_msg_attr);
if (ret < 0) {
if (ret == -EEXIST) {
dev_info(&data->client->dev,
"Debugfs already exists\n");
ret = 0;
} else {
dev_err(&data->client->dev,
"Failed to create 'debug_msg' file\n");
}
}
return 0;
return ret;
}
static void mxt_debug_msg_remove(struct mxt_data *data)