diff options
author | FUJITA Tomonori <fujita.tomonori@gmail.com> | 2025-08-21 09:20:55 +0900 |
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committer | Danilo Krummrich <dakr@kernel.org> | 2025-08-21 21:09:48 +0200 |
commit | 349a64256534aa2c73787b22f7bc0517a211cdab (patch) | |
tree | 2b91ce01eab02ce423c4f7f2fcd087d2d1751c63 /rust/kernel/io.rs | |
parent | 842aedc3907deb154eedb88c7e4c3278c9b33701 (diff) |
rust: Add read_poll_timeout function
Add read_poll_timeout function which polls periodically until a
condition is met, an error occurs, or the timeout is reached.
The C's read_poll_timeout (include/linux/iopoll.h) is a complicated
macro and a simple wrapper for Rust doesn't work. So this implements
the same functionality in Rust.
The C version uses usleep_range() while the Rust version uses
fsleep(), which uses the best sleep method so it works with spans that
usleep_range() doesn't work nicely with.
The sleep_before_read argument isn't supported since there is no user
for now. It's rarely used in the C version.
Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Fiona Behrens <me@kloenk.dev>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Tested-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Link: https://lore.kernel.org/r/20250821002055.3654160-3-fujita.tomonori@gmail.com
[ Fix a minor typo and add missing backticks. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'rust/kernel/io.rs')
-rw-r--r-- | rust/kernel/io.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/rust/kernel/io.rs b/rust/kernel/io.rs index 03b467722b86..ee182b0b5452 100644 --- a/rust/kernel/io.rs +++ b/rust/kernel/io.rs @@ -8,6 +8,7 @@ use crate::error::{code::EINVAL, Result}; use crate::{bindings, build_assert, ffi::c_void}; pub mod mem; +pub mod poll; pub mod resource; pub use resource::Resource; |