Remove unneeded function and checks in avalon write code.

driver-avalon.c

@@ -121,12 +121,6 @@ static inline void avalon_create_task(struct avalon_task *at,
 	memcpy(at->data, work->data + 64, 12);
 }
 
-static void avalon_wait_ready(struct cgpu_info *avalon)
-{
-	while (!avalon_ready(avalon))
-		nmsleep(40);
-}
-
 static int avalon_write(struct cgpu_info *avalon, char *buf, ssize_t len)
 {
 	ssize_t wrote = 0;
@@ -134,7 +128,6 @@ static int avalon_write(struct cgpu_info *avalon, char *buf, ssize_t len)
 	while (len > 0) {
 		int amount, err;
 
-		avalon_wait_ready(avalon);
 		err = usb_write(avalon, buf + wrote, len, &amount, C_AVALON_TASK);
 		applog(LOG_DEBUG, "%s%i: usb_write got err %d",
 		       avalon->drv->name, avalon->device_id, err);
@@ -1078,7 +1071,6 @@ static int64_t avalon_scanhash(struct thr_info *thr)
 static void avalon_flush_work(struct cgpu_info *avalon)
 {
 	struct avalon_info *info = avalon->device_data;
-	struct thr_info *thr = info->thr;
 
 	mutex_lock(&info->qlock);
 	/* Will overwrite any work queued */

driver-avalon.h

@@ -124,7 +124,6 @@ struct avalon_info {
 #define AVA_SEND_OK 0
 
 #define avalon_buffer_full(avalon) !usb_ftdi_cts(avalon)
-#define avalon_ready(avalon)	usb_ftdi_ctw(avalon)
 
 #define AVALON_READ_TIME(baud) ((double)AVALON_READ_SIZE * (double)8.0 / (double)(baud))
 #define ASSERT1(condition) __maybe_unused static char sizeof_uint32_t_must_be_4[(condition)?1:-1]

usbutils.c

@@ -2228,6 +2228,7 @@ int _usb_read(struct cgpu_info *cgpu, int ep, char *buf, size_t bufsiz, int *pro
 #define FTDI_RS0_RI     (1 << 6)
 #define FTDI_RS0_RLSD   (1 << 7)
 
+/* Clear to send for FTDI */
 int usb_ftdi_cts(struct cgpu_info *cgpu)
 {
 	struct cg_usb_device *usbdev = cgpu->usbdev;
@@ -2240,26 +2241,6 @@ int usb_ftdi_cts(struct cgpu_info *cgpu)
 	return (ret & FTDI_RS0_CTS);
 }
 
-#define FTDI_RS_DR	1
-#define FTDI_RS_OE	(1<<1)
-#define FTDI_RS_PE	(1<<2)
-#define FTDI_RS_FE	(1<<3)
-#define FTDI_RS_BI	(1<<4)
-#define FTDI_RS_THRE	(1<<5)
-#define FTDI_RS_TEMT	(1<<6)
-#define FTDI_RS_FIFO	(1<<7)
-
-int usb_ftdi_ctw(struct cgpu_info *cgpu)
-{
-	struct cg_usb_device *usbdev = cgpu->usbdev;
-	unsigned char buf[2];
-
-	libusb_control_transfer(usbdev->handle, (uint8_t)FTDI_TYPE_IN,
-				(uint8_t)5, (uint16_t)0, (uint16_t)0,
-				buf, 2, DEVTIMEOUT);
-	return ((buf[1] & FTDI_RS_THRE) && (buf[1] & FTDI_RS_TEMT));
-}
-
 int _usb_write(struct cgpu_info *cgpu, int ep, char *buf, size_t bufsiz, int *processed, unsigned int timeout, __maybe_unused enum usb_cmds cmd)
 {
 	struct cg_usb_device *usbdev = cgpu->usbdev;