[PATCH 4.9 38/42] eeprom: at24: make spd world-readable again

[Greg Kroah-Hartman]

From: Jean Delvare <jdelvare@xxxxxxx>

commit 25e5ef302c24a6fead369c0cfe88c073d7b97ca8 upstream.

The integration of the at24 driver into the nvmem framework broke the
world-readability of spd EEPROMs. Fix it.

Signed-off-by: Jean Delvare <jdelvare@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 57d155506dd5 ("eeprom: at24: extend driver to plug into the NVMEM framework")
Cc: Andrew Lunn <andrew@xxxxxxx>
Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Bartosz Golaszewski <brgl@xxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
[Bartosz: backported the patch to older branches]
Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/misc/eeprom/at24.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -777,7 +777,7 @@ static int at24_probe(struct i2c_client
 	at24->nvmem_config.name = dev_name(&client->dev);
 	at24->nvmem_config.dev = &client->dev;
 	at24->nvmem_config.read_only = !writable;
-	at24->nvmem_config.root_only = true;
+	at24->nvmem_config.root_only = !(chip.flags & AT24_FLAG_IRUGO);
 	at24->nvmem_config.owner = THIS_MODULE;
 	at24->nvmem_config.compat = true;
 	at24->nvmem_config.base_dev = &client->dev;