linux-kernel - [PATCH v2 2/2] nvmem: Use the same permissions for eeprom as for nvmem

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Message-ID: <20190728184255.563332e6@endymion>
Date:   Sun, 28 Jul 2019 18:42:55 +0200
From:   Jean Delvare <jdelvare@...e.de>
To:     Linux I2C <linux-i2c@...r.kernel.org>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Arnd Bergmann <arnd@...db.de>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/2] nvmem: Use the same permissions for eeprom as for
 nvmem

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.")
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Arnd Bergmann <arnd@...db.de>
---
Changes since V1:
 * Split into 2 patches, one to the at24 driver and one to the nvmem
   core. drivers/nvmem/nvmem-sysfs.c |   15 +++++++++++----

 1 file changed, 11 insertions(+), 4 deletions(-)

--- linux-5.2.orig/drivers/nvmem/nvmem-sysfs.c	2019-07-08 00:41:56.000000000 +0200
+++ linux-5.2/drivers/nvmem/nvmem-sysfs.c	2019-07-28 18:06:53.105140893 +0200
@@ -224,10 +224,17 @@ int nvmem_sysfs_setup_compat(struct nvme
 	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


-- 
Jean Delvare
SUSE L3 Support