This was added together with usb_check_bulk_endpoints(). The carl9170
driver uses this function.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
backport/backport-include/linux/usb.h | 2 ++
backport/compat/backport-6.4.c | 26 ++++++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/backport/backport-include/linux/usb.h b/backport/backport-include/linux/usb.h
index 0f6c3b88..ce85f1e1 100644
--- a/backport/backport-include/linux/usb.h
+++ b/backport/backport-include/linux/usb.h
@@ -11,6 +11,8 @@
#define usb_check_bulk_endpoints LINUX_BACKPORT(usb_check_bulk_endpoints)
bool usb_check_bulk_endpoints(
const struct usb_interface *intf, const u8 *ep_addrs);
+bool usb_check_int_endpoints(
+ const struct usb_interface *intf, const u8 *ep_addrs);
#endif /* < 5.15 */
#if LINUX_VERSION_IS_LESS(5,19,0)
diff --git a/backport/compat/backport-6.4.c b/backport/compat/backport-6.4.c
index 73177e24..1291fa02 100644
--- a/backport/compat/backport-6.4.c
+++ b/backport/compat/backport-6.4.c
@@ -58,4 +58,30 @@ bool usb_check_bulk_endpoints(
return true;
}
EXPORT_SYMBOL_GPL(usb_check_bulk_endpoints);
+
+/**
+ * usb_check_int_endpoints - Check whether an interface's current altsetting
+ * contains a set of interrupt endpoints with the given addresses.
+ * @intf: the interface whose current altsetting should be searched
+ * @ep_addrs: 0-terminated array of the endpoint addresses (number and
+ * direction) to look for
+ *
+ * Search for endpoints with the specified addresses and check their types.
+ *
+ * Return: %true if all the endpoints are found and are interrupt,
+ * %false otherwise.
+ */
+bool usb_check_int_endpoints(
+ const struct usb_interface *intf, const u8 *ep_addrs)
+{
+ const struct usb_host_endpoint *ep;
+
+ for (; *ep_addrs; ++ep_addrs) {
+ ep = usb_find_endpoint(intf, *ep_addrs);
+ if (!ep || !usb_endpoint_xfer_int(&ep->desc))
+ return false;
+ }
+ return true;
+}
+EXPORT_SYMBOL_GPL(usb_check_int_endpoints);
#endif
--
2.45.2
