From: Joel Holdsworth <redacted>
Date: Wed, 27 Jun 2012 20:39:26 +0000 (+0100)
Subject: fx2lafw: Made libusb_claim_interface error messages more informative
X-Git-Tag: dsupstream~896
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=0c156e06c55a5b69385778fb00292d5866660a7f;p=libsigrok.git

fx2lafw: Made libusb_claim_interface error messages more informative
---

diff --git a/hardware/fx2lafw/fx2lafw.c b/hardware/fx2lafw/fx2lafw.c
index 2e88241e..2b8f1c34 100644
--- a/hardware/fx2lafw/fx2lafw.c
+++ b/hardware/fx2lafw/fx2lafw.c
@@ -495,7 +495,21 @@ static int hw_dev_open(int dev_index)
 
 	ret = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE);
 	if (ret != 0) {
-		sr_err("fx2lafw: Unable to claim interface: %d.", ret);
+		switch(ret) {
+		case LIBUSB_ERROR_BUSY:
+			sr_err("fx2lafw: Unable to claim USB interface. Another "
+				"program or driver has already claimed it.");
+			break;
+
+		case LIBUSB_ERROR_NO_DEVICE:
+			sr_err("fx2lafw: Device has been disconnected.");
+			break;
+
+		default:
+			sr_err("fx2lafw: Unable to claim interface: %d.", ret);
+			break;
+		}
+
 		return SR_ERR;
 	}