From: Eddie James <eajames@linux.ibm.com>
Date: Tue, 18 Feb 2025 22:09:59 +0000 (-0600)
Subject: eeprom: ee1004: Check chip before probing
X-Git-Tag: v6.14.9~374
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3d31d6fc9ab81296284b09f4e7d19ad0eecd1853;p=thirdparty%2Fkernel%2Fstable.git

eeprom: ee1004: Check chip before probing

[ Upstream commit d9406677428e9234ea62bb2d2f5e996d1b777760 ]

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

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20250218220959.721698-1-eajames@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

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);