X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=ao-tools%2Flib%2Fcc-usb.c;h=1e023c7ebe8f7b37e99eeef7b044d294a5f531dd;hp=1a4dc7a1163f7460bdf139422be70d72ed44d35c;hb=b67e6ae8ce34ef119da96b442776bb3d78b4f874;hpb=2b57158737f85c7009658b3e923c66794f01bbdf

diff --git a/ao-tools/lib/cc-usb.c b/ao-tools/lib/cc-usb.c
index 1a4dc7a1..1e023c7e 100644
--- a/ao-tools/lib/cc-usb.c
+++ b/ao-tools/lib/cc-usb.c
@@ -207,8 +207,10 @@ _cc_usb_sync(struct cc_usb *cc, int wait_for_input, int write_timeout)
 					write(2, cc->in_buf, cc->in_count);
 					cc->in_count = 0;
 				}
-			} else if (ret < 0)
+			} else if (ret <= 0) {
 				perror("read");
+				return -1;
+			}
 		}
 		if (fds.revents & POLLOUT) {
 			ret = write(cc->fd, cc->out_buf,