From: Jiada Wang <jiada_wang@mentor.com>
To: <nick@shmanahar.org>, <dmitry.torokhov@gmail.com>,
<jikos@kernel.org>, <benjamin.tissoires@redhat.com>,
<rydberg@bitmath.org>
Cc: <linux-input@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<jiada_wang@mentor.com>
Subject: [PATCH v3 39/49] Input: Atmel: improve error handling in mxt_start()
Date: Tue, 17 Sep 2019 18:42:15 +0900 [thread overview]
Message-ID: <20190917094225.18927-1-jiada_wang@mentor.com> (raw)
From: Deepak Das <deepak_das@mentor.com>
mxt_start() does not return error in any of
the failure cases which will allow input_dev->open()
to return success even in case of any failure.
This commit modifies mxt_start() to return error
in failure cases.
Signed-off-by: Deepak Das <deepak_das@mentor.com>
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 31 ++++++++++++------------
1 file changed, 16 insertions(+), 15 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index f2fa62289577..2fac43da0a2b 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3974,12 +3974,13 @@ static int mxt_start(struct mxt_data *data)
switch (data->suspend_mode) {
case MXT_SUSPEND_T9_CTRL:
- mxt_soft_reset(data);
-
+ ret = mxt_soft_reset(data);
+ if (ret)
+ break;
/* Touch enable */
/* 0x83 = SCANEN | RPTEN | ENABLE */
- mxt_write_object(data,
- MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
+ ret = mxt_write_object(data,
+ MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
break;
case MXT_SUSPEND_REGULATOR:
@@ -3993,27 +3994,26 @@ static int mxt_start(struct mxt_data *data)
* Discard any touch messages still in message buffer
* from before chip went to sleep
*/
- mxt_process_messages_until_invalid(data);
+ ret = mxt_process_messages_until_invalid(data);
+ if (ret)
+ break;
ret = mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
if (ret)
- return ret;
+ break;
/* Recalibrate since chip has been in deep sleep */
ret = mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
if (ret)
- return ret;
+ break;
ret = mxt_acquire_irq(data);
- if (ret)
- return ret;
-
- break;
}
- data->suspended = false;
+ if (!ret)
+ data->suspended = false;
- return 0;
+ return ret;
}
static int mxt_stop(struct mxt_data *data)
@@ -4334,6 +4334,7 @@ static int __maybe_unused mxt_resume(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct mxt_data *data = i2c_get_clientdata(client);
struct input_dev *input_dev = data->input_dev;
+ int ret = 0;
if (!input_dev)
return 0;
@@ -4341,11 +4342,11 @@ static int __maybe_unused mxt_resume(struct device *dev)
mutex_lock(&input_dev->mutex);
if (input_dev->users)
- mxt_start(data);
+ ret = mxt_start(data);
mutex_unlock(&input_dev->mutex);
- return 0;
+ return ret;
}
static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
--
2.19.2
next reply other threads:[~2019-09-17 9:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 9:42 Jiada Wang [this message]
2019-09-17 9:42 ` [PATCH v3 40/49] Input: Atmel: improve error handling in mxt_initialize() Jiada Wang
2019-09-17 9:42 ` [PATCH v3 41/49] Input: Atmel: improve error handling in mxt_update_cfg() Jiada Wang
2019-09-17 9:42 ` [PATCH v3 42/49] Input: Atmel: Improve error handling in mxt_initialize_input_device() Jiada Wang
2019-09-17 9:42 ` [PATCH v3 43/49] Input: Atmel: handle ReportID "0x00" while processing T5 messages Jiada Wang
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