X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/blobdiff_plain/627e3f3325f221daeb7dfe3610cc6d5caecc3b58..d57fdaf62fa1ce7e8573404206903ad281ff889c:/hmcfgusb.c

diff --git a/hmcfgusb.c b/hmcfgusb.c
index 75838fe..1a6bb76 100644
--- a/hmcfgusb.c
+++ b/hmcfgusb.c
@@ -317,6 +317,8 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 
 	dev->n_pfd = dev->n_usb_pfd;
 
+	quit = 0;
+
 	return dev;
 }
 
@@ -370,6 +372,7 @@ int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
 		n = poll(dev->pfd, dev->n_pfd, tv.tv_sec * 1000);
 		if (n < 0) {
 			perror("poll");
+			errno = 0;
 			return -1;
 		} else if (n == 0) {
 			usb_event = 1;
@@ -380,6 +383,7 @@ int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
 						usb_event = 1;
 						break;
 					} else {
+						errno = 0;
 						return dev->pfd[fd_n].fd;
 					}
 				}
@@ -397,8 +401,11 @@ int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
 		}
 	}
 
-	if (quit)
+	errno = 0;
+	if (quit) {
+		fprintf(stderr, "closing device-connection due to error %d\n", quit);
 		errno = quit;
+	}
 
 	return -1;
 }