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gpu: nova-core: gsp: use empty slices instead of [0..0] ranges

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The current code unnecessarily uses, for example, &before_rx[0..0] to
return an empty slice. Instead, just use an empty slice.

Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260129-nova-core-cmdq1-v3-3-2ede85493a27@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
This commit is contained in:
Eliot Courtney
2026-01-29 16:45:01 +09:00
committed by Alexandre Courbot
parent bbe6831c02
commit f6f072d8ef
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/nova-core/gsp/cmdq.rs
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@@ -232,7 +232,7 @@ fn new(dev: &device::Device<device::Bound>) -> Result<Self> {
// to `rx`, minus one unit, belongs to the driver.
if rx == 0 {
let last = after_tx.len() - 1;
(&mut after_tx[..last], &mut before_tx[0..0])
(&mut after_tx[..last], &mut [])
} else {
(after_tx, &mut before_tx[..rx])
}
@@ -241,7 +241,7 @@ fn new(dev: &device::Device<device::Bound>) -> Result<Self> {
//
// PANIC: per the invariants of `cpu_write_ptr` and `gsp_read_ptr`, `rx` and `tx` are
// `<= MSGQ_NUM_PAGES`, and the test above ensured that `rx > tx`.
(after_tx.split_at_mut(rx - tx).0, &mut before_tx[0..0])
(after_tx.split_at_mut(rx - tx).0, &mut [])
}
}
@@ -263,8 +263,8 @@ fn new(dev: &device::Device<device::Bound>) -> Result<Self> {
let (before_rx, after_rx) = gsp_mem.gspq.msgq.data.split_at(rx);
match tx.cmp(&rx) {
cmp::Ordering::Equal => (&after_rx[0..0], &after_rx[0..0]),
cmp::Ordering::Greater => (&after_rx[..tx], &before_rx[0..0]),
cmp::Ordering::Equal => (&[], &[]),
cmp::Ordering::Greater => (&after_rx[..tx], &[]),
cmp::Ordering::Less => (after_rx, &before_rx[..tx]),
}
}