linux-kernel - [PATCH AUTOSEL 6.12 297/486] eeprom: ee1004: Check chip before probing

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Message-Id: <20250505223922.2682012-297-sashal@kernel.org>
Date: Mon,  5 May 2025 18:36:13 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Eddie James <eajames@...ux.ibm.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sasha Levin <sashal@...nel.org>,
	W_Armin@....de,
	linux@...ck-us.net,
	dan.carpenter@...aro.org,
	u.kleine-koenig@...gutronix.de
Subject: [PATCH AUTOSEL 6.12 297/486] eeprom: ee1004: Check chip before probing

From: Eddie James <eajames@...ux.ibm.com>

[ Upstream commit d9406677428e9234ea62bb2d2f5e996d1b777760 ]

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

Signed-off-by: Eddie James <eajames@...ux.ibm.com>
Link: https://lore.kernel.org/r/20250218220959.721698-1-eajames@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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);
-- 
2.39.5