diff options
| -rw-r--r-- | rust/kernel/error.rs | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs index 0223d48ab43d..7e25871063df 100644 --- a/rust/kernel/error.rs +++ b/rust/kernel/error.rs @@ -76,7 +76,6 @@ impl Error { /// /// It is a bug to pass an out-of-range `errno`. `EINVAL` would /// be returned in such a case. - #[allow(dead_code)] pub(crate) fn from_errno(errno: core::ffi::c_int) -> Error { if errno < -(bindings::MAX_ERRNO as i32) || errno >= 0 { // TODO: Make it a `WARN_ONCE` once available. @@ -180,3 +179,13 @@ impl From<core::convert::Infallible> for Error { /// it should still be modeled as returning a `Result` rather than /// just an [`Error`]. pub type Result<T = ()> = core::result::Result<T, Error>; + +/// Converts an integer as returned by a C kernel function to an error if it's negative, and +/// `Ok(())` otherwise. +pub fn to_result(err: core::ffi::c_int) -> Result { + if err < 0 { + Err(Error::from_errno(err)) + } else { + Ok(()) + } +} |