[PATCH 4.19 49/50] nvmem: Use the same permissions for eeprom as for nvmem

[Greg Kroah-Hartman]

From: Jean Delvare <jdelvare@xxxxxxx>

commit e70d8b287301eb6d7c7761c6171c56af62110ea3 upstream.

The compatibility "eeprom" attribute is currently root-only no
matter what the configuration says. The "nvmem" attribute does
respect the setting of the root_only configuration bit, so do the
same for "eeprom".

Signed-off-by: Jean Delvare <jdelvare@xxxxxxx>
Fixes: b6c217ab9be6 ("nvmem: Add backwards compatibility support for older EEPROM drivers.")
Reviewed-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Cc: Andrew Lunn <andrew@xxxxxxx>
Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Link: https://lore.kernel.org/r/20190728184255.563332e6@endymion
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/nvmem/core.c |   15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -415,10 +415,17 @@ static int nvmem_setup_compat(struct nvm
 	if (!config->base_dev)
 		return -EINVAL;
 
-	if (nvmem->read_only)
-		nvmem->eeprom = bin_attr_ro_root_nvmem;
-	else
-		nvmem->eeprom = bin_attr_rw_root_nvmem;
+	if (nvmem->read_only) {
+		if (config->root_only)
+			nvmem->eeprom = bin_attr_ro_root_nvmem;
+		else
+			nvmem->eeprom = bin_attr_ro_nvmem;
+	} else {
+		if (config->root_only)
+			nvmem->eeprom = bin_attr_rw_root_nvmem;
+		else
+			nvmem->eeprom = bin_attr_rw_nvmem;
+	}
 	nvmem->eeprom.attr.name = "eeprom";
 	nvmem->eeprom.size = nvmem->size;
 #ifdef CONFIG_DEBUG_LOCK_ALLOC