linux-kernel - [PATCH] HID: i2c-hid: show the error of failing to fetch the HID Descriptor

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Date:   Wed, 21 Oct 2020 22:33:05 +0800
From:   Coiby Xu <coiby.xu@...il.com>
To:     linux-input@...r.kernel.org
Cc:     Barnabás Pőcze <pobrn@...tonmail.com>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] HID: i2c-hid: show the error of failing to fetch the HID Descriptor

i2c_hid_probe should notify the user of the error of failing to fetch
the HID Descriptor instead of silently exiting.

Link: https://forum.manjaro.org/t/elan-touchpad-working-in-live-but-not-in-native-os/31860/55
Cc: Barnabás Pőcze <pobrn@...tonmail.com>
Signed-off-by: Coiby Xu <coiby.xu@...il.com>
---
 drivers/hid/i2c-hid/i2c-hid-core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 786e3e9af1c9..577d324be16d 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -1099,8 +1099,11 @@ static int i2c_hid_probe(struct i2c_client *client,
 	}
 
 	ret = i2c_hid_fetch_hid_descriptor(ihid);
-	if (ret < 0)
+	if (ret < 0) {
+		dev_err(&client->dev,
+			"Failed to fetch the HID Descriptor\n");
 		goto err_regulator;
+	}
 
 	ret = i2c_hid_init_irq(client);
 	if (ret < 0)
-- 
2.28.0