scsi: 3w-sas: 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 <[email protected]>
Link: https://lore.kernel.org/r/20241216-sysfs-const-bin_attr-scsi-v1-2-f0a5e54b3437@weissschuh.net
Signed-off-by: Martin K. Petersen <[email protected]>

Author: t-8ch

drivers/scsi/3w-sas.c

@@ -96,7 +96,7 @@ static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_res
 
 /* This function returns AENs through sysfs */
 static ssize_t twl_sysfs_aen_read(struct file *filp, struct kobject *kobj,
-				  struct bin_attribute *bin_attr,
+				  const struct bin_attribute *bin_attr,
 				  char *outbuf, loff_t offset, size_t count)
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
@@ -116,18 +116,18 @@ static ssize_t twl_sysfs_aen_read(struct file *filp, struct kobject *kobj,
 } /* End twl_sysfs_aen_read() */
 
 /* aen_read sysfs attribute initializer */
-static struct bin_attribute twl_sysfs_aen_read_attr = {
+static const struct bin_attribute twl_sysfs_aen_read_attr = {
 	.attr = {
 		.name = "3ware_aen_read",
 		.mode = S_IRUSR,
 	},
 	.size = 0,
-	.read = twl_sysfs_aen_read
+	.read_new = twl_sysfs_aen_read
 };
 
 /* This function returns driver compatibility info through sysfs */
 static ssize_t twl_sysfs_compat_info(struct file *filp, struct kobject *kobj,
-				     struct bin_attribute *bin_attr,
+				     const struct bin_attribute *bin_attr,
 				     char *outbuf, loff_t offset, size_t count)
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
@@ -147,13 +147,13 @@ static ssize_t twl_sysfs_compat_info(struct file *filp, struct kobject *kobj,
 } /* End twl_sysfs_compat_info() */
 
 /* compat_info sysfs attribute initializer */
-static struct bin_attribute twl_sysfs_compat_info_attr = {
+static const struct bin_attribute twl_sysfs_compat_info_attr = {
 	.attr = {
 		.name = "3ware_compat_info",
 		.mode = S_IRUSR,
 	},
 	.size = 0,
-	.read = twl_sysfs_compat_info
+	.read_new = twl_sysfs_compat_info
 };
 
 /* Show some statistics about the card */