tree ef8e14b921dd1a74ac6214844a0547a71b788bc8
parent d8289e7dfe5541dfef59520917d81cd39e10c8f3
author Simon Glass <sjg@chromium.org> 1723070844 -0600
committer Tom Rini <trini@konsulko.com> 1723240999 -0600

sandbox: Return error code from read/write/seek

The existing API for these functions is different from the rest of
U-Boot, in that any error code must be obtained from the errno variable
on failure. This variable is part of the C library, so accessing it
outside of the special 'sandbox' shim-functions is not ideal.

Adjust the API to return an error code, to avoid this. Update existing
uses to check for any negative value, rather than just -1.

Signed-off-by: Simon Glass <sjg@chromium.org>