X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fhardware%2Fasix-sigma%2Fprotocol.c;h=253e98a0aa5349c58a3babff447f3af1b20776db;hb=a9016883f800c40a1866c3f0d011cdb0c256888b;hp=98cfce7a185b1b4dd45a2940b372a04b227a5fd2;hpb=85c032e48553458b43d0eb8315a7587abee4493f;p=libsigrok.git

diff --git a/src/hardware/asix-sigma/protocol.c b/src/hardware/asix-sigma/protocol.c
index 98cfce7a..253e98a0 100644
--- a/src/hardware/asix-sigma/protocol.c
+++ b/src/hardware/asix-sigma/protocol.c
@@ -442,10 +442,18 @@ static int upload_firmware(struct sr_context *ctx,
 	unsigned char *buf;
 	unsigned char pins;
 	size_t buf_size;
-	const char *firmware = sigma_firmware_files[firmware_idx];
-	struct ftdi_context *ftdic = &devc->ftdic;
+	const char *firmware;
+	struct ftdi_context *ftdic;
+
+	/* Avoid downloading the same firmware multiple times. */
+	firmware = sigma_firmware_files[firmware_idx];
+	if (devc->cur_firmware == firmware_idx) {
+		sr_info("Not uploading firmware file '%s' again.", firmware);
+		return SR_OK;
+	}
 
 	/* Make sure it's an ASIX SIGMA. */
+	ftdic = &devc->ftdic;
 	ret = ftdi_usb_open_desc(ftdic, USB_VENDOR, USB_PRODUCT,
 				 USB_DESCRIPTION, NULL);
 	if (ret < 0) {