thunderbolt: Changes for v5.7 merge window

- A couple of commits that make the driver to use flexible-array member
   instead of zero-length array extension. This allows compiler to issue a
   warning if the flexible array is not the last member of a structure.
 
 - Use scnprintf() instead of snprintf() to avoid potential buffer
   overflow.
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Merge tag 'thunderbolt-for-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next

Mika writes:

thunderbolt: Changes for v5.7 merge window

- A couple of commits that make the driver to use flexible-array member
  instead of zero-length array extension. This allows compiler to issue a
  warning if the flexible array is not the last member of a structure.

- Use scnprintf() instead of snprintf() to avoid potential buffer
  overflow.

* tag 'thunderbolt-for-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt:
  thunderbolt: Use scnprintf() for avoiding potential buffer overflow
  thunderbolt: icm: Replace zero-length array with flexible-array member
  thunderbolt: eeprom: Replace zero-length array with flexible-array member

drivers/thunderbolt/domain.c

@@ -147,10 +147,10 @@ static ssize_t boot_acl_show(struct device *dev, struct device_attribute *attr,
 
 	for (ret = 0, i = 0; i < tb->nboot_acl; i++) {
 		if (!uuid_is_null(&uuids[i]))
-			ret += snprintf(buf + ret, PAGE_SIZE - ret, "%pUb",
+			ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%pUb",
 					&uuids[i]);
 
-		ret += snprintf(buf + ret, PAGE_SIZE - ret, "%s",
+		ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s",
 			       i < tb->nboot_acl - 1 ? "," : "\n");
 	}
 

drivers/thunderbolt/eeprom.c

@@ -247,7 +247,7 @@ struct tb_drom_entry_header {
 
 struct tb_drom_entry_generic {
 	struct tb_drom_entry_header header;
-	u8 data[0];
+	u8 data[];
 } __packed;
 
 struct tb_drom_entry_port {

drivers/thunderbolt/icm.c

@@ -114,7 +114,7 @@ struct icm_notification {
 struct ep_name_entry {
 	u8 len;
 	u8 type;
-	u8 data[0];
+	u8 data[];
 };
 
 #define EP_NAME_INTEL_VSS	0x10