6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Guenter Roeck <linux@xxxxxxxxxxxx>
[ Upstream commit 249b4deaff71cfc6ac9a8e436af876be6d84052b ]
Instantiating a device by calling i2c_new_client_device() assumes that the
device is not already instantiated. If that is not the case, it will return
an error and generate a misleading kernel log message.
i2c i2c-0: Failed to register i2c client jc42 at 0x18 (-16)
This can be reproduced by unloading the ee1004 driver and loading it again.
Avoid this by calling i2c_new_scanned_device() instead, which returns
silently if a device is already instantiated or does not exist.
Fixes: 393bd1000f81 ("eeprom: ee1004: add support for temperature sensor")
Cc: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Cc: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240629173716.20389-1-linux@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/misc/eeprom/ee1004.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/misc/eeprom/ee1004.c b/drivers/misc/eeprom/ee1004.c
index 21feebc3044c3..71ca66d1df82c 100644
--- a/drivers/misc/eeprom/ee1004.c
+++ b/drivers/misc/eeprom/ee1004.c
@@ -185,6 +185,8 @@ BIN_ATTRIBUTE_GROUPS(ee1004);
static void ee1004_probe_temp_sensor(struct i2c_client *client)
{
struct i2c_board_info info = { .type = "jc42" };
+ unsigned short addr = 0x18 | (client->addr & 7);
+ unsigned short addr_list[] = { addr, I2C_CLIENT_END };
u8 byte14;
int ret;
@@ -193,9 +195,7 @@ static void ee1004_probe_temp_sensor(struct i2c_client *client)
if (ret != 1 || !(byte14 & BIT(7)))
return;
- info.addr = 0x18 | (client->addr & 7);
-
- i2c_new_client_device(client->adapter, &info);
+ i2c_new_scanned_device(client->adapter, &info, addr_list, NULL);
}
static void ee1004_cleanup(int idx, struct ee1004_bus_data *bd)
--
2.43.0
