From: Michael Gernoth <michael@gernoth.net>
Date: Sat, 13 Jul 2013 16:48:32 +0000 (+0200)
Subject: send a full frame containing only zeroes instead of a zero-byte frame
X-Git-Tag: v0.100~58
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/commitdiff_plain/3435bdb66e2ea9d3f2be157702b2d116cc45a25f

send a full frame containing only zeroes instead of a zero-byte frame
---

diff --git a/hmcfgusb.c b/hmcfgusb.c
index d086419..d8a442f 100644
--- a/hmcfgusb.c
+++ b/hmcfgusb.c
@@ -146,8 +146,11 @@ int hmcfgusb_send_null_frame(struct hmcfgusb_dev *usbdev, int silent)
 {
 	int err;
 	int cnt;
+	unsigned char out[0x40];
 
-	err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, NULL, 0, &cnt, USB_TIMEOUT);
+	memset(out, 0, sizeof(out));
+
+	err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, out, sizeof(out), &cnt, USB_TIMEOUT);
 	if (err && (!silent)) {
 		fprintf(stderr, "Can't send null frame: %s\n", usb_strerror(err));
 		return 0;