IO Framework: use standard errno codes as return values
This patch redefines the values of IO_FAIL, IO_NOT_SUPPORTED and
IO_RESOURCES_EXHAUSTED to match the corresponding definitions in
errno.h:
#define IO_FAIL (-ENOENT)
#define IO_NOT_SUPPORTED (-ENODEV)
#define IO_RESOURCES_EXHAUSTED (-ENOMEM)
NOTE: please note that the IO_FAIL, IO_NOT_SUPPORTED and
IO_RESOURCES_EXHAUSTED definitions are considered deprecated
and their usage should be avoided. Callers should rely on errno.h
definitions when checking the return values of IO functions.
Change-Id: Ic8491aa43384b6ee44951ebfc053a3ded16a80be
diff --git a/docs/porting-guide.md b/docs/porting-guide.md
index c369844..db6038a 100644
--- a/docs/porting-guide.md
+++ b/docs/porting-guide.md
@@ -358,13 +358,12 @@
Defines the maximum number of registered IO devices. Attempting to register
more devices than this value using `io_register_device()` will fail with
- IO_RESOURCES_EXHAUSTED.
+ -ENOMEM.
* **#define : MAX_IO_HANDLES**
Defines the maximum number of open IO handles. Attempting to open more IO
- entities than this value using `io_open()` will fail with
- IO_RESOURCES_EXHAUSTED.
+ entities than this value using `io_open()` will fail with -ENOMEM.
If the platform needs to allocate data within the per-cpu data framework in
BL3-1, it should define the following macro. Currently this is only required if