linux-kernel - [PATCH v11 49/56] Input: Atmel: Improve error handling in mxt_initialize_input

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Message-ID: <20200508055656.96389-50-jiada_wang@mentor.com>
Date:   Thu, 7 May 2020 22:56:49 -0700
From:   Jiada Wang <jiada_wang@...tor.com>
To:     <nick@...anahar.org>, <dmitry.torokhov@...il.com>,
        <jikos@...nel.org>, <benjamin.tissoires@...hat.com>,
        <bsz@...ihalf.com>
CC:     <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <erosca@...adit-jv.com>, <Andrew_Gabbasov@...tor.com>,
        <jiada_wang@...tor.com>
Subject: [PATCH v11 49/56] Input: Atmel: Improve error handling in mxt_initialize_input_device()

From: Deepak Das <deepak_das@...tor.com>

Currently Driver probe continues with a warning message when it
fails to get the proper multitouch object configurations like
TouchScreen resolution.

But Driver probe should fail in case of above scneario because it
will not behave as expected without the proper touchscreen
configurations.

This commit modifies mxt_initialize_input_device() to return error
when it fails to get the proper touch screen configurations.

Signed-off-by: Deepak Das <deepak_das@...tor.com>
Signed-off-by: Dean Jenkins <Dean_Jenkins@...tor.com>
Signed-off-by: George G. Davis <george_davis@...tor.com>
Signed-off-by: Jiada Wang <jiada_wang@...tor.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 83fa2caddeab..92701bf5291f 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -2748,15 +2748,19 @@ static int mxt_initialize_input_device(struct mxt_data *data)
 	case MXT_TOUCH_MULTI_T9:
 		num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
 		error = mxt_read_t9_resolution(data);
-		if (error)
-			dev_warn(dev, "Failed to initialize T9 resolution\n");
+		if (error) {
+			dev_err(dev, "Failed to initialize T9 resolution\n");
+			return error;
+		}
 		break;
 
 	case MXT_TOUCH_MULTITOUCHSCREEN_T100:
 		num_mt_slots = data->num_touchids;
 		error = mxt_read_t100_config(data);
-		if (error)
-			dev_warn(dev, "Failed to read T100 config\n");
+		if (error) {
+			dev_err(dev, "Failed to read T100 config\n");
+			return error;
+		}
 		break;
 
 	default:
-- 
2.17.1