linux-kernel - [PATCH AUTOSEL 5.2 061/123] nvmem: Use the same permissions for eeprom as for nvmem

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Date:   Tue, 13 Aug 2019 22:09:45 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jean Delvare <jdelvare@...e.de>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Andrew Lunn <andrew@...n.ch>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.2 061/123] nvmem: Use the same permissions for eeprom as for nvmem

From: Jean Delvare <jdelvare@...e.de>

[ Upstream commit e70d8b287301eb6d7c7761c6171c56af62110ea3 ]

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@...e.de>
Fixes: b6c217ab9be6 ("nvmem: Add backwards compatibility support for older EEPROM drivers.")
Reviewed-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc: Arnd Bergmann <arnd@...db.de>
Link: https://lore.kernel.org/r/20190728184255.563332e6@endymion
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/nvmem/nvmem-sysfs.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/nvmem/nvmem-sysfs.c b/drivers/nvmem/nvmem-sysfs.c
index 6f303b91f6e70..9e0c429cd08a2 100644
--- a/drivers/nvmem/nvmem-sysfs.c
+++ b/drivers/nvmem/nvmem-sysfs.c
@@ -224,10 +224,17 @@ int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem,
 	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
-- 
2.20.1