drivers/libhid.c: HIDGetItemData(): debug-trace failures due to strin…

…g_to_path() or FindObject_with_Path() [#2816]

Signed-off-by: Jim Klimov <[email protected]>

drivers/libhid.c

@@ -487,15 +487,22 @@ const char *HIDDataType(const HIDData_t *hiddata)
 HIDData_t *HIDGetItemData(const char *hidpath, usage_tables_t *utab)
 {
 	int	r;
-	HIDPath_t Path;
+	HIDPath_t	Path;
+	HIDData_t	*p;
 
 	r = string_to_path(hidpath, &Path, utab);
 	if (r <= 0) {
+		upsdebugx(4, "%s: string_to_path() failed to decipher '%s'", __func__, hidpath);
 		return NULL;
 	}
 
 	/* Get info on object (reportID, offset and size) */
-	return FindObject_with_Path(pDesc, &Path, interrupt_only ? ITEM_INPUT:ITEM_FEATURE);
+	p = FindObject_with_Path(pDesc, &Path, interrupt_only ? ITEM_INPUT:ITEM_FEATURE);
+
+	if (!p)
+		upsdebugx(4, "%s: FindObject_with_Path() failed to locate '%s'", __func__, hidpath);
+
+	return p;
 }
 
 char *HIDGetDataItem(const HIDData_t *hiddata, usage_tables_t *utab)