linux-kernel - [PATCH] HID: i2c-hid: fix format string mismatch

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Date:   Fri, 14 May 2021 15:58:50 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Julian Sax <jsbc@....de>
Cc:     Arnd Bergmann <arnd@...db.de>, Hans de Goede <hdegoede@...hat.com>,
        Douglas Anderson <dianders@...omium.org>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Xiaofei Tan <tanxiaofei@...wei.com>,
        Coiby Xu <coiby.xu@...il.com>, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: [PATCH] HID: i2c-hid: fix format string mismatch

From: Arnd Bergmann <arnd@...db.de>

clang doesn't like printing a 32-bit integer using %hX format string:

drivers/hid/i2c-hid/i2c-hid-core.c:994:18: error: format specifies type 'unsigned short' but the argument has type '__u32' (aka 'unsigned int') [-Werror,-Wformat]
                 client->name, hid->vendor, hid->product);
                               ^~~~~~~~~~~
drivers/hid/i2c-hid/i2c-hid-core.c:994:31: error: format specifies type 'unsigned short' but the argument has type '__u32' (aka 'unsigned int') [-Werror,-Wformat]
                 client->name, hid->vendor, hid->product);
                                            ^~~~~~~~~~~~

Use an explicit cast to truncate it to the low 16 bits instead.

Fixes: 9ee3e06610fd ("HID: i2c-hid: override HID descriptors for certain devices")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/hid/i2c-hid/i2c-hid-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 9993133989a5..f9d28ad17d9c 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -990,8 +990,8 @@ int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops,
 	hid->vendor = le16_to_cpu(ihid->hdesc.wVendorID);
 	hid->product = le16_to_cpu(ihid->hdesc.wProductID);
 
-	snprintf(hid->name, sizeof(hid->name), "%s %04hX:%04hX",
-		 client->name, hid->vendor, hid->product);
+	snprintf(hid->name, sizeof(hid->name), "%s %04X:%04X",
+		 client->name, (u16)hid->vendor, (u16)hid->product);
 	strlcpy(hid->phys, dev_name(&client->dev), sizeof(hid->phys));
 
 	ihid->quirks = i2c_hid_lookup_quirk(hid->vendor, hid->product);
-- 
2.29.2