X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/blobdiff_plain/627e3f3325f221daeb7dfe3610cc6d5caecc3b58..b0bf6ad2612d6459451e9a38cb1059b567990eb8:/hmcfgusb.c

diff --git a/hmcfgusb.c b/hmcfgusb.c
index 75838fe..0bcb5ae 100644
--- a/hmcfgusb.c
+++ b/hmcfgusb.c
@@ -191,7 +191,6 @@ static struct libusb_transfer *hmcfgusb_prepare_int(libusb_device_handle *devh,
 	if (err != 0) {
 		fprintf(stderr, "Can't submit transfer: %s\n", usb_strerror(err));
 		libusb_free_transfer(transfer);
-		free(data_buf);
 		return NULL;
 	}
 
@@ -219,6 +218,7 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 			if (cb_data && cb_data->dev && cb_data->dev->transfer) {
 				libusb_free_transfer(cb_data->dev->transfer);
 				cb_data->dev->transfer = NULL;
+				free(cb_data);
 			}
 			return;
 		}
@@ -226,7 +226,18 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 		if (cb_data && cb_data->cb) {
 			if (debug)
 				hexdump(transfer->buffer, transfer->actual_length, "USB > ");
-			cb_data->cb(transfer->buffer, transfer->actual_length, cb_data->data);
+
+			if (!cb_data->cb(transfer->buffer, transfer->actual_length, cb_data->data)) {
+				quit = EIO;
+
+				if (cb_data && cb_data->dev && cb_data->dev->transfer) {
+					libusb_free_transfer(cb_data->dev->transfer);
+					cb_data->dev->transfer = NULL;
+					free(cb_data);
+				}
+
+				return;
+			}
 		} else {
 			hexdump(transfer->buffer, transfer->actual_length, "> ");
 		}
@@ -235,8 +246,9 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 	err = libusb_submit_transfer(transfer);
 	if (err != 0) {
 		fprintf(stderr, "Can't re-submit transfer: %s\n", usb_strerror(err));
-		free(transfer->buffer);
 		libusb_free_transfer(transfer);
+		cb_data->dev->transfer = NULL;
+		free(cb_data);
 	}
 }
 
@@ -273,6 +285,7 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 	cb_data = malloc(sizeof(struct hmcfgusb_cb_data));
 	if (!cb_data) {
 		perror("Can't allocate memory for hmcfgusb_cb_data");
+		free(dev);
 		return NULL;
 	}
 
@@ -285,6 +298,8 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 	dev->transfer = hmcfgusb_prepare_int(devh, hmcfgusb_interrupt, cb_data);
 	if (!dev->transfer) {
 		fprintf(stderr, "Can't prepare async device io!\n");
+		free(dev);
+		free(cb_data);
 		return NULL;
 	}
 
@@ -292,6 +307,7 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 	if (!usb_pfd) {
 		fprintf(stderr, "Can't get FDset from libusb!\n");
 		free(dev);
+		free(cb_data);
 		return NULL;
 	}
 
@@ -302,6 +318,8 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 	dev->pfd = malloc(dev->n_usb_pfd * sizeof(struct pollfd));
 	if (!dev->pfd) {
 		perror("Can't allocate memory for poll-fds");
+		free(dev);
+		free(cb_data);
 		return NULL;
 	}
 
@@ -317,6 +335,8 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 
 	dev->n_pfd = dev->n_usb_pfd;
 
+	quit = 0;
+
 	return dev;
 }
 
@@ -370,6 +390,7 @@ 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 +401,7 @@ int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
 						usb_event = 1;
 						break;
 					} else {
+						errno = 0;
 						return dev->pfd[fd_n].fd;
 					}
 				}
@@ -397,8 +419,11 @@ 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;
 }