diff --git a/drivers/io/io_semihosting.c b/drivers/io/io_semihosting.c
index 8e62be1..63d0f68 100644
--- a/drivers/io/io_semihosting.c
+++ b/drivers/io/io_semihosting.c
@@ -84,10 +84,9 @@
 static int sh_dev_open(const uintptr_t dev_spec __unused,
 		io_dev_info_t **dev_info)
 {
-	int result = IO_SUCCESS;
 	assert(dev_info != NULL);
 	*dev_info = (io_dev_info_t *)&sh_dev_info; /* cast away const */
-	return result;
+	return 0;
 }
 
 
@@ -95,7 +94,7 @@
 static int sh_file_open(io_dev_info_t *dev_info __attribute__((unused)),
 		const uintptr_t spec, io_entity_t *entity)
 {
-	int result = IO_FAIL;
+	int result = -ENOENT;
 	long sh_result = -1;
 	const io_file_spec_t *file_spec = (const io_file_spec_t *)spec;
 
@@ -106,9 +105,7 @@
 
 	if (sh_result > 0) {
 		entity->info = (uintptr_t)sh_result;
-		result = IO_SUCCESS;
-	} else {
-		result = IO_FAIL;
+		result = 0;
 	}
 	return result;
 }
@@ -117,7 +114,6 @@
 /* Seek to a particular file offset on the semi-hosting device */
 static int sh_file_seek(io_entity_t *entity, int mode, ssize_t offset)
 {
-	int result = IO_FAIL;
 	long file_handle, sh_result;
 
 	assert(entity != NULL);
@@ -126,16 +122,14 @@
 
 	sh_result = semihosting_file_seek(file_handle, offset);
 
-	result = (sh_result == 0) ? IO_SUCCESS : IO_FAIL;
-
-	return result;
+	return (sh_result == 0) ? 0 : -ENOENT;
 }
 
 
 /* Return the size of a file on the semi-hosting device */
 static int sh_file_len(io_entity_t *entity, size_t *length)
 {
-	int result = IO_FAIL;
+	int result = -ENOENT;
 
 	assert(entity != NULL);
 	assert(length != NULL);
@@ -144,7 +138,7 @@
 	long sh_result = semihosting_file_length(sh_handle);
 
 	if (sh_result >= 0) {
-		result = IO_SUCCESS;
+		result = 0;
 		*length = (size_t)sh_result;
 	}
 
@@ -156,7 +150,7 @@
 static int sh_file_read(io_entity_t *entity, uintptr_t buffer, size_t length,
 		size_t *length_read)
 {
-	int result = IO_FAIL;
+	int result = -ENOENT;
 	long sh_result = -1;
 	size_t bytes = length;
 	long file_handle;
@@ -171,9 +165,8 @@
 
 	if (sh_result >= 0) {
 		*length_read = (bytes != length) ? bytes : length;
-		result = IO_SUCCESS;
-	} else
-		result = IO_FAIL;
+		result = 0;
+	}
 
 	return result;
 }
@@ -197,14 +190,13 @@
 
 	*length_written = length - bytes;
 
-	return (sh_result == 0) ? IO_SUCCESS : IO_FAIL;
+	return (sh_result == 0) ? 0 : -ENOENT;
 }
 
 
 /* Close a file on the semi-hosting device */
 static int sh_file_close(io_entity_t *entity)
 {
-	int result = IO_FAIL;
 	long sh_result = -1;
 	long file_handle;
 
@@ -214,9 +206,7 @@
 
 	sh_result = semihosting_file_close(file_handle);
 
-	result = (sh_result >= 0) ? IO_SUCCESS : IO_FAIL;
-
-	return result;
+	return (sh_result >= 0) ? 0 : -ENOENT;
 }
 
 
@@ -225,11 +215,11 @@
 /* Register the semi-hosting driver with the IO abstraction */
 int register_io_dev_sh(const io_dev_connector_t **dev_con)
 {
-	int result = IO_FAIL;
+	int result;
 	assert(dev_con != NULL);
 
 	result = io_register_device(&sh_dev_info);
-	if (result == IO_SUCCESS)
+	if (result == 0)
 		*dev_con = &sh_dev_connector;
 
 	return result;