gpu: nova-core: replace wait_on with kernel equivalents

wait_on was a temporary helper function waiting for a kernel crate
equivalent.

Now that read_poll_timeout and fsleep are available, use them and remove
wait_on.

Acked-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Message-ID: <20251020-nova_wait_on-v1-1-2eb87fb38d14@nvidia.com>

1 files changed, 0 insertions, 27 deletions

diff --git a/drivers/gpu/nova-core/util.rs b/drivers/gpu/nova-core/util.rs
deleted file mode 100644
index bf35f00cb732..000000000000
--- a/drivers/gpu/nova-core/util.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-use kernel::prelude::*;
-use kernel::time::{Delta, Instant, Monotonic};
-
-/// Wait until `cond` is true or `timeout` elapsed.
-///
-/// When `cond` evaluates to `Some`, its return value is returned.
-///
-/// `Err(ETIMEDOUT)` is returned if `timeout` has been reached without `cond` evaluating to
-/// `Some`.
-///
-/// TODO[DLAY]: replace with `read_poll_timeout` once it is available.
-/// (https://lore.kernel.org/lkml/20250220070611.214262-8-fujita.tomonori@gmail.com/)
-pub(crate) fn wait_on<R, F: Fn() -> Option<R>>(timeout: Delta, cond: F) -> Result<R> {
-    let start_time = Instant::<Monotonic>::now();
-
-    loop {
-        if let Some(ret) = cond() {
-            return Ok(ret);
-        }
-
-        if start_time.elapsed().as_nanos() > timeout.as_nanos() {
-            return Err(ETIMEDOUT);
-        }
-    }
-}