The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 25e5ef302c24a6fead369c0cfe88c073d7b97ca8 Mon Sep 17 00:00:00 2001
From: Jean Delvare jdelvare@suse.de Date: Sun, 28 Jul 2019 18:41:38 +0200 Subject: [PATCH] eeprom: at24: make spd world-readable again
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@suse.de Cc: stable@vger.kernel.org Fixes: 57d155506dd5 ("eeprom: at24: extend driver to plug into the NVMEM framework") Cc: Andrew Lunn andrew@lunn.ch Cc: Srinivas Kandagatla srinivas.kandagatla@linaro.org Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Bartosz Golaszewski brgl@bgdev.pl Cc: Arnd Bergmann arnd@arndb.de Signed-off-by: Bartosz Golaszewski bgolaszewski@baylibre.com
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 35bf2477693d..518945b2f737 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -685,7 +685,7 @@ static int at24_probe(struct i2c_client *client) nvmem_config.name = dev_name(dev); nvmem_config.dev = dev; nvmem_config.read_only = !writable; - nvmem_config.root_only = true; + nvmem_config.root_only = !(flags & AT24_FLAG_IRUGO); nvmem_config.owner = THIS_MODULE; nvmem_config.compat = true; nvmem_config.base_dev = dev;