From 26fa6f2e341c14625af20683b71bdf5dbe1812f0 Mon Sep 17 00:00:00 2001
From: PaulStoffregen <paul@pjrc.com>
Date: Sun, 12 Feb 2017 00:22:50 -0800
Subject: [PATCH] Use linked list for device's drivers, not fixed size array

---
 USBHost.h       | 3 ++-
 enumeration.cpp | 7 +++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/USBHost.h b/USBHost.h
index ae28786..184de5d 100644
--- a/USBHost.h
+++ b/USBHost.h
@@ -63,7 +63,8 @@ struct Device_struct {
 	Pipe_t   *control_pipe;
 	Device_t *next;
 	setup_t  setup;
-	USBHostDriver *driver[6];
+	//USBHostDriver *driver[6];
+	USBHostDriver *drivers;
 	uint8_t  speed; // 0=12, 1=1.5, 2=480 Mbit/sec
 	uint8_t  address;
 	uint8_t  hub_address;
diff --git a/enumeration.cpp b/enumeration.cpp
index 12b29c9..8740bfb 100644
--- a/enumeration.cpp
+++ b/enumeration.cpp
@@ -219,9 +219,8 @@ void USBHost::enumeration(const Transfer_t *transfer)
 			return;
 		case 15: // control transfers for other stuff?
 			// TODO: handle other standard control: set/clear feature, etc
-			for (unsigned int i=0; i < 6; i++) {
-				if (dev->driver[i] == NULL) break; // no more drivers
-				if (dev->driver[i]->control_callback(transfer)) {
+			for (USBHostDriver *d = dev->drivers; d != NULL; d = d->next) {
+				if (d->control_callback(transfer)) {
 					// this driver processed the control transfer reply
 					return;
 				}
@@ -245,7 +244,7 @@ static void claim_drivers(Device_t *dev)
 				available_drivers = driver->next;
 			}
 			driver->next = NULL;
-			dev->driver[0] = driver;
+			dev->drivers = driver;
 			return;
 		}
 		prev = driver;