diff --git a/api.c b/api.c
index 06ddbbeb..ffbf4a17 100644
--- a/api.c
+++ b/api.c
@@ -3089,7 +3089,6 @@ static int itemstats(struct io_data *io_data, int i, char *id, struct cgminer_st
 	if (cgpu) {
 #ifdef USE_USBUTILS
 		char details[256];
-		int val;
 
 		if (cgpu->usbinfo.pipe_count)
 			snprintf(details, sizeof(details),
@@ -3143,14 +3142,6 @@ static int itemstats(struct io_data *io_data, int i, char *id, struct cgminer_st
 
 		root = api_add_string(root, "USB tmo", details, true);
 		root = api_add_int(root, "USB cancellations", &cgpu->usb_cancels, false);
-		root = api_add_int(root, "USB bulk reads", &cgpu->usb_bulk_reads, false);
-		val = cgpu->usb_rlock_total_wait / (cgpu->usb_bulk_reads ? : 1);
-		root = api_add_int(root, "USB avg rlock ms wait", &val, true);
-		root = api_add_int(root, "USB max rlock ms wait", &cgpu->usb_rlock_max_wait, false);
-		root = api_add_int(root, "USB bulk writes", &cgpu->usb_bulk_writes, false);
-		val = cgpu->usb_wlock_total_wait / (cgpu->usb_bulk_writes ? : 1);
-		root = api_add_int(root, "USB avg wlock ms wait", &val, true);
-		root = api_add_int(root, "USB max wlock ms wait", &cgpu->usb_wlock_max_wait, false);
 #endif
 	}
 
diff --git a/miner.h b/miner.h
index aa6f81b8..30b6cd72 100644
--- a/miner.h
+++ b/miner.h
@@ -472,12 +472,6 @@ struct cgpu_info {
 #endif
 #ifdef USE_USBUTILS
 	struct cg_usb_info usbinfo;
-	int usb_bulk_writes;
-	int usb_bulk_reads;
-	int usb_wlock_total_wait;
-	int usb_rlock_total_wait;
-	int usb_wlock_max_wait;
-	int usb_rlock_max_wait;
 	int usb_cancels;
 #endif
 #ifdef USE_MODMINER
diff --git a/usbutils.c b/usbutils.c
index 7ebded34..ec9b088a 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -2364,18 +2364,8 @@ int _usb_read(struct cgpu_info *cgpu, int intinfo, int epinfo, char *buf, size_t
 	int endlen;
 	unsigned char *ptr, *usbbuf = cgpu->usbinfo.bulkbuf;
 	size_t usbbufread;
-	int lock_wait;
 
-	/* Get statistics on how long reads wait on the devlock */
-	cgpu->usb_bulk_reads++;
-
-	cgtime(&read_start);
 	DEVRLOCK(cgpu, pstate);
-	cgtime(&tv_finish);
-	lock_wait = ms_tdiff(&tv_finish, &read_start);
-	cgpu->usb_rlock_total_wait += lock_wait;
-	if (lock_wait > cgpu->usb_rlock_max_wait)
-		cgpu->usb_rlock_max_wait = lock_wait;
 
 	if (cgpu->usbinfo.nodev) {
 		*buf = '\0';
@@ -2642,18 +2632,8 @@ int _usb_write(struct cgpu_info *cgpu, int intinfo, int epinfo, char *buf, size_
 	double max, done;
 	__maybe_unused bool first = true;
 	int err, sent, tot, pstate;
-	int lock_wait;
 
-	/* Get statistics on how long writes wait on the devlock */
-	cgpu->usb_bulk_writes++;
-
-	cgtime(&read_start);
 	DEVRLOCK(cgpu, pstate);
-	cgtime(&tv_finish);
-	lock_wait = ms_tdiff(&tv_finish, &read_start);
-	cgpu->usb_wlock_total_wait += lock_wait;
-	if (lock_wait > cgpu->usb_wlock_max_wait)
-		cgpu->usb_wlock_max_wait = lock_wait;
 
 	USBDEBUG("USB debug: _usb_write(%s (nodev=%s),intinfo=%d,epinfo=%d,buf='%s',bufsiz=%d,proc=%p,timeout=%u,cmd=%s)", cgpu->drv->name, bool_str(cgpu->usbinfo.nodev), intinfo, epinfo, (char *)str_text(buf), (int)bufsiz, processed, timeout, usb_cmdname(cmd));