diff --git a/dev_hidraw.c b/dev_hidraw.c
index 8fe005d..f8d2e6a 100644
--- a/dev_hidraw.c
+++ b/dev_hidraw.c
@@ -56,8 +56,6 @@ int dev_hidraw_open(
 ) {
     int res = -ENOENT;
 
-    
-
     char path[MAX_PATH_LEN] = "\0";
     
     DIR *d;
@@ -75,7 +73,7 @@ int dev_hidraw_open(
 
             // try to open the device, if it cannot be opened to go the next
             int fd = open(path, O_RDWR);
-            if (fd != 0) {
+            if (fd < 0) {
                 //fprintf(stderr, "Cannot open %s, device skipped.\n", path);
                 continue;
             }
diff --git a/dev_iio.c b/dev_iio.c
index 4d81ef8..8888d14 100644
--- a/dev_iio.c
+++ b/dev_iio.c
@@ -384,8 +384,8 @@ int dev_iio_open(
             //printf("Testing for device %s\n", path);
 
             // try to open the device, if it cannot be opened to go the next
-            int fd = dev_iio_create(path, out_dev);
-            if (fd != 0) {
+            const int iio_creation_res = dev_iio_create(path, out_dev);
+            if (iio_creation_res != 0) {
                 //fprintf(stderr, "Cannot open %s, device skipped.\n", path);
                 continue;
             }
diff --git a/input_dev.h b/input_dev.h
index ed597a8..e6e830d 100644
--- a/input_dev.h
+++ b/input_dev.h
@@ -28,7 +28,7 @@ typedef enum input_dev_type {
 typedef struct hidraw_filters {
     const int16_t pid;
     const int16_t vid;
-    const uint16_t rdesc_size;
+    const uint16_t rdesc_size; // wc -c < /sys/class/hidraw/hidraw0/device/report_descriptor
 } hidraw_filters_t;
 
 typedef struct uinput_filters {