Abstract out flushing of interrupt reads in BF1 devices.

driver-bitfury.c

@@ -27,12 +27,17 @@ static void bitfury_empty_buffer(struct cgpu_info *bitfury)
 	} while (amount);
 }
 
-static void bitfury_open(struct cgpu_info *bitfury)
+static void bitfury_empty_intbuf(struct cgpu_info *bitfury)
 {
 	char buf[8];
 	int amount;
 
 	usb_read_ii(bitfury, 0, buf, 8, &amount, C_BF1_IFLUSH);
+}
+
+static void bitfury_open(struct cgpu_info *bitfury)
+{
+	bitfury_empty_intbuf(bitfury);
 	/* Magic open sequence */
 	usb_transfer(bitfury, 0x21, 0x22, 0x0003, 0, C_BF1_OPEN);
 	bitfury_empty_buffer(bitfury);
@@ -40,13 +45,10 @@ static void bitfury_open(struct cgpu_info *bitfury)
 
 static void bitfury_close(struct cgpu_info *bitfury)
 {
-	char buf[8];
-	int amount;
-
 	bitfury_empty_buffer(bitfury);
 	/* Magic close sequence */
 	usb_transfer(bitfury, 0x21, 0x22, 0, 0, C_BF1_CLOSE);
-	usb_read_ii(bitfury, 0, buf, 8, &amount, C_BF1_IFLUSH);
+	bitfury_empty_intbuf(bitfury);
 	bitfury_empty_buffer(bitfury);
 	usb_transfer(bitfury, 0x23, 0x08, 0x9053, 1, C_BF1_CLOSE);
 	bitfury_empty_buffer(bitfury);