linux-kernel - [PATCH] eeprom: ee1004: Check chip before probing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20250218220959.721698-1-eajames@linux.ibm.com>
Date: Tue, 18 Feb 2025 16:09:59 -0600
From: Eddie James <eajames@...ux.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: arnd@...db.de, gregkh@...uxfoundation.org, eajames@...ux.ibm.com
Subject: [PATCH] eeprom: ee1004: Check chip before probing

Like other eeprom drivers, check if the device is really there and
functional before probing.

Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
 drivers/misc/eeprom/ee1004.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/misc/eeprom/ee1004.c b/drivers/misc/eeprom/ee1004.c
index 89224d4af4a20..e13f9fdd9d7b1 100644
--- a/drivers/misc/eeprom/ee1004.c
+++ b/drivers/misc/eeprom/ee1004.c
@@ -304,6 +304,10 @@ static int ee1004_probe(struct i2c_client *client)
 				     I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_READ_BYTE_DATA))
 		return -EPFNOSUPPORT;
 
+	err = i2c_smbus_read_byte(client);
+	if (err < 0)
+		return -ENODEV;
+
 	mutex_lock(&ee1004_bus_lock);
 
 	err = ee1004_init_bus_data(client);
-- 
2.43.5