RDMA/hfi1: 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://patch.msgid.link/20250114-sysfs-const-bin_attr-infiniband-v1-1-397aaa94d453@weissschuh.net
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/hfi1/sysfs.c b/drivers/infiniband/hw/hfi1/sysfs.c
index d62ba5fdd80c876eedf572bde408131202548e9d..d94216c7d576f6418140e0d096314633aa42ab3b 100644 (file)
--- a/drivers/infiniband/hw/hfi1/sysfs.c
+++ b/drivers/infiniband/hw/hfi1/sysfs.c
@@ -27,8 +27,8 @@ static struct hfi1_pportdata *hfi1_get_pportdata_kobj(struct kobject *kobj)
  * Congestion control table size followed by table entries
  */
 static ssize_t cc_table_bin_read(struct file *filp, struct kobject *kobj,
-                                struct bin_attribute *bin_attr, char *buf,
-                                loff_t pos, size_t count)
+                                const struct bin_attribute *bin_attr,
+                                char *buf, loff_t pos, size_t count)
 {
        int ret;
        struct hfi1_pportdata *ppd = hfi1_get_pportdata_kobj(kobj);
@@ -57,7 +57,7 @@ static ssize_t cc_table_bin_read(struct file *filp, struct kobject *kobj,
 
        return count;
 }
-static BIN_ATTR_RO(cc_table_bin, PAGE_SIZE);
+static const BIN_ATTR_RO(cc_table_bin, PAGE_SIZE);
 
 /*
  * Congestion settings: port control, control map and an array of 16
@@ -65,7 +65,7 @@ static BIN_ATTR_RO(cc_table_bin, PAGE_SIZE);
  * trigger threshold and the minimum injection rate delay.
  */
 static ssize_t cc_setting_bin_read(struct file *filp, struct kobject *kobj,
-                                  struct bin_attribute *bin_attr,
+                                  const struct bin_attribute *bin_attr,
                                   char *buf, loff_t pos, size_t count)
 {
        struct hfi1_pportdata *ppd = hfi1_get_pportdata_kobj(kobj);
@@ -93,9 +93,9 @@ static ssize_t cc_setting_bin_read(struct file *filp, struct kobject *kobj,
 
        return count;
 }
-static BIN_ATTR_RO(cc_setting_bin, PAGE_SIZE);
+static const BIN_ATTR_RO(cc_setting_bin, PAGE_SIZE);
 
-static struct bin_attribute *port_cc_bin_attributes[] = {
+static const struct bin_attribute *const port_cc_bin_attributes[] = {
        &bin_attr_cc_setting_bin,
        &bin_attr_cc_table_bin,
        NULL
@@ -134,7 +134,7 @@ static struct attribute *port_cc_attributes[] = {
 static const struct attribute_group port_cc_group = {
        .name = "CCMgtA",
        .attrs = port_cc_attributes,
-       .bin_attrs = port_cc_bin_attributes,
+       .bin_attrs_new = port_cc_bin_attributes,
 };
 
 /* Start sc2vl */