scsi: qedf: 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>
Link: https://lore.kernel.org/r/20241216-sysfs-const-bin_attr-scsi-v1-8-f0a5e54b3437@weissschuh.net
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: t-8ch

drivers/scsi/qedf/qedf_attr.c

@@ -104,7 +104,7 @@ void qedf_capture_grc_dump(struct qedf_ctx *qedf)
 
 static ssize_t
 qedf_sysfs_read_grcdump(struct file *filep, struct kobject *kobj,
-			struct bin_attribute *ba, char *buf, loff_t off,
+			const struct bin_attribute *ba, char *buf, loff_t off,
 			size_t count)
 {
 	ssize_t ret = 0;
@@ -124,7 +124,7 @@ qedf_sysfs_read_grcdump(struct file *filep, struct kobject *kobj,
 
 static ssize_t
 qedf_sysfs_write_grcdump(struct file *filep, struct kobject *kobj,
-			struct bin_attribute *ba, char *buf, loff_t off,
+			const struct bin_attribute *ba, char *buf, loff_t off,
 			size_t count)
 {
 	struct fc_lport *lport = NULL;
@@ -160,14 +160,14 @@ qedf_sysfs_write_grcdump(struct file *filep, struct kobject *kobj,
 	return count;
 }
 
-static struct bin_attribute sysfs_grcdump_attr = {
+static const struct bin_attribute sysfs_grcdump_attr = {
 	.attr = {
 		.name = "grcdump",
 		.mode = S_IRUSR | S_IWUSR,
 	},
 	.size = 0,
-	.read = qedf_sysfs_read_grcdump,
-	.write = qedf_sysfs_write_grcdump,
+	.read_new = qedf_sysfs_read_grcdump,
+	.write_new = qedf_sysfs_write_grcdump,
 };
 
 static struct sysfs_bin_attrs bin_file_entries[] = {

drivers/scsi/qedf/qedf_dbg.h

@@ -100,7 +100,7 @@ struct Scsi_Host;
 
 struct sysfs_bin_attrs {
 	char *name;
-	struct bin_attribute *attr;
+	const struct bin_attribute *attr;
 };
 
 extern int qedf_alloc_grc_dump_buf(uint8_t **buf, uint32_t len);