HID: roccat: pyro: constify 'struct bin_attribute'

The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

diff --git a/drivers/hid/hid-roccat-pyra.c b/drivers/hid/hid-roccat-pyra.c
index eeb3d38cd80584bd716ad493cff2892a2d5af552..2b53fbfbb8979ad1d1994e462b624b3f72480447 100644 (file)
--- a/drivers/hid/hid-roccat-pyra.c
+++ b/drivers/hid/hid-roccat-pyra.c
@@ -129,8 +129,8 @@ static ssize_t pyra_sysfs_write(struct file *fp, struct kobject *kobj,
 
 #define PYRA_SYSFS_W(thingy, THINGY) \
 static ssize_t pyra_sysfs_write_ ## thingy(struct file *fp, \
-               struct kobject *kobj, struct bin_attribute *attr, char *buf, \
-               loff_t off, size_t count) \
+               struct kobject *kobj, const struct bin_attribute *attr, \
+               char *buf, loff_t off, size_t count) \
 { \
        return pyra_sysfs_write(fp, kobj, buf, off, count, \
                        PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
@@ -138,8 +138,8 @@ static ssize_t pyra_sysfs_write_ ## thingy(struct file *fp, \
 
 #define PYRA_SYSFS_R(thingy, THINGY) \
 static ssize_t pyra_sysfs_read_ ## thingy(struct file *fp, \
-               struct kobject *kobj, struct bin_attribute *attr, char *buf, \
-               loff_t off, size_t count) \
+               struct kobject *kobj, const struct bin_attribute *attr, \
+               char *buf, loff_t off, size_t count) \
 { \
        return pyra_sysfs_read(fp, kobj, buf, off, count, \
                        PYRA_SIZE_ ## THINGY, PYRA_COMMAND_ ## THINGY); \
@@ -151,27 +151,27 @@ PYRA_SYSFS_R(thingy, THINGY)
 
 #define PYRA_BIN_ATTRIBUTE_RW(thingy, THINGY) \
 PYRA_SYSFS_RW(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
        .attr = { .name = #thingy, .mode = 0660 }, \
        .size = PYRA_SIZE_ ## THINGY, \
-       .read = pyra_sysfs_read_ ## thingy, \
-       .write = pyra_sysfs_write_ ## thingy \
+       .read_new = pyra_sysfs_read_ ## thingy, \
+       .write_new = pyra_sysfs_write_ ## thingy \
 }
 
 #define PYRA_BIN_ATTRIBUTE_R(thingy, THINGY) \
 PYRA_SYSFS_R(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
        .attr = { .name = #thingy, .mode = 0440 }, \
-       .size = PYRA_SIZE_ ## THINGY, \
-       .read = pyra_sysfs_read_ ## thingy, \
+       .size_new = PYRA_SIZE_ ## THINGY, \
+       .read_new = pyra_sysfs_read_ ## thingy, \
 }
 
 #define PYRA_BIN_ATTRIBUTE_W(thingy, THINGY) \
 PYRA_SYSFS_W(thingy, THINGY); \
-static struct bin_attribute bin_attr_##thingy = { \
+static const struct bin_attribute bin_attr_##thingy = { \
        .attr = { .name = #thingy, .mode = 0220 }, \
        .size = PYRA_SIZE_ ## THINGY, \
-       .write = pyra_sysfs_write_ ## thingy \
+       .write_new = pyra_sysfs_write_ ## thingy \
 }
 
 PYRA_BIN_ATTRIBUTE_W(control, CONTROL);
@@ -180,8 +180,8 @@ PYRA_BIN_ATTRIBUTE_RW(profile_settings, PROFILE_SETTINGS);
 PYRA_BIN_ATTRIBUTE_RW(profile_buttons, PROFILE_BUTTONS);
 
 static ssize_t pyra_sysfs_read_profilex_settings(struct file *fp,
-               struct kobject *kobj, struct bin_attribute *attr, char *buf,
-               loff_t off, size_t count)
+               struct kobject *kobj, const struct bin_attribute *attr,
+               char *buf, loff_t off, size_t count)
 {
        struct device *dev = kobj_to_dev(kobj)->parent->parent;
        struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
@@ -198,8 +198,8 @@ static ssize_t pyra_sysfs_read_profilex_settings(struct file *fp,
 }
 
 static ssize_t pyra_sysfs_read_profilex_buttons(struct file *fp,
-               struct kobject *kobj, struct bin_attribute *attr, char *buf,
-               loff_t off, size_t count)
+               struct kobject *kobj, const struct bin_attribute *attr,
+               char *buf, loff_t off, size_t count)
 {
        struct device *dev = kobj_to_dev(kobj)->parent->parent;
        struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
@@ -216,16 +216,16 @@ static ssize_t pyra_sysfs_read_profilex_buttons(struct file *fp,
 }
 
 #define PROFILE_ATTR(number)                                           \
-static struct bin_attribute bin_attr_profile##number##_settings = {    \
+static const struct bin_attribute bin_attr_profile##number##_settings = {      \
        .attr = { .name = "profile" #number "_settings", .mode = 0440 },        \
        .size = PYRA_SIZE_PROFILE_SETTINGS,                             \
-       .read = pyra_sysfs_read_profilex_settings,                      \
+       .read_new = pyra_sysfs_read_profilex_settings,                  \
        .private = &profile_numbers[number-1],                          \
 };                                                                     \
-static struct bin_attribute bin_attr_profile##number##_buttons = {     \
+static const struct bin_attribute bin_attr_profile##number##_buttons = {       \
        .attr = { .name = "profile" #number "_buttons", .mode = 0440 }, \
        .size = PYRA_SIZE_PROFILE_BUTTONS,                              \
-       .read = pyra_sysfs_read_profilex_buttons,                       \
+       .read_new = pyra_sysfs_read_profilex_buttons,                   \
        .private = &profile_numbers[number-1],                          \
 };
 PROFILE_ATTR(1);
@@ -235,8 +235,8 @@ PROFILE_ATTR(4);
 PROFILE_ATTR(5);
 
 static ssize_t pyra_sysfs_write_settings(struct file *fp,
-               struct kobject *kobj, struct bin_attribute *attr, char *buf,
-               loff_t off, size_t count)
+               struct kobject *kobj, const struct bin_attribute *attr,
+               char *buf, loff_t off, size_t count)
 {
        struct device *dev = kobj_to_dev(kobj)->parent->parent;
        struct pyra_device *pyra = hid_get_drvdata(dev_get_drvdata(dev));
@@ -273,7 +273,7 @@ static ssize_t pyra_sysfs_write_settings(struct file *fp,
 }
 
 PYRA_SYSFS_R(settings, SETTINGS);
-static struct bin_attribute bin_attr_settings =
+static const struct bin_attribute bin_attr_settings =
        __BIN_ATTR(settings, (S_IWUSR | S_IRUGO),
                   pyra_sysfs_read_settings, pyra_sysfs_write_settings,
                   PYRA_SIZE_SETTINGS);
@@ -334,7 +334,7 @@ static struct attribute *pyra_attrs[] = {
        NULL,
 };
 
-static struct bin_attribute *pyra_bin_attributes[] = {
+static const struct bin_attribute *const pyra_bin_attributes[] = {
        &bin_attr_control,
        &bin_attr_info,
        &bin_attr_profile_settings,
@@ -355,7 +355,7 @@ static struct bin_attribute *pyra_bin_attributes[] = {
 
 static const struct attribute_group pyra_group = {
        .attrs = pyra_attrs,
-       .bin_attrs = pyra_bin_attributes,
+       .bin_attrs_new = pyra_bin_attributes,
 };
 
 static const struct attribute_group *pyra_groups[] = {