6.12-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Böhler witcher@wiredspace.de
commit c408dd81678bb0a957eae96962c913c242e069f7 upstream.
Rust's standard library's `std::iter::Iterator` trait provides a function `find` that finds the first element that satisfies a predicate. The function `Version::from_segments` is doing the same thing but is implementing the same logic itself.
Clippy complains about this in the `manual_find` lint:
error: manual implementation of `Iterator::find` --> drivers/gpu/drm/drm_panic_qr.rs:212:9 | 212 | / for v in (1..=40).map(|k| Version(k)) { 213 | | if v.max_data() * 8 >= segments.iter().map(|s| s.total_size_bits(v)).sum() { 214 | | return Some(v); 215 | | } 216 | | } 217 | | None | |____________^ help: replace with an iterator: `(1..=40).map(|k| Version(k)).find(|&v| v.max_data() * 8 >= segments.iter().map(|s| s.total_size_bits(v)).sum())` | = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_find = note: `-D clippy::manual-find` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::manual_find)]`
Use `Iterator::find` instead to make the intention clearer.
At the same time, clean up the redundant closure that Clippy warns about too:
error: redundant closure --> drivers/gpu/drm/drm_panic_qr.rs:212:31 | 212 | for v in (1..=40).map(|k| Version(k)) { | ^^^^^^^^^^^^^^ help: replace the closure with the function itself: `Version` | = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure = note: `-D clippy::redundant-closure` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::redundant_closure)]`
Fixes: cb5164ac43d0 ("drm/panic: Add a QR code panic screen") Reported-by: Miguel Ojeda ojeda@kernel.org Link: https://github.com/Rust-for-Linux/linux/issues/1123 Signed-off-by: Thomas Böhler witcher@wiredspace.de Reviewed-by: Jocelyn Falempe jfalempe@redhat.com Link: https://lore.kernel.org/r/20241019084048.22336-2-witcher@wiredspace.de [ Reworded to mention the redundant closure cleanup too. - Miguel ] Signed-off-by: Miguel Ojeda ojeda@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/drm_panic_qr.rs | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/drm_panic_qr.rs +++ b/drivers/gpu/drm/drm_panic_qr.rs @@ -209,12 +209,9 @@ const FORMAT_INFOS_QR_L: [u16; 8] = [ impl Version { /// Returns the smallest QR version than can hold these segments. fn from_segments(segments: &[&Segment<'_>]) -> Option<Version> { - for v in (1..=40).map(|k| Version(k)) { - if v.max_data() * 8 >= segments.iter().map(|s| s.total_size_bits(v)).sum() { - return Some(v); - } - } - None + (1..=40) + .map(Version) + .find(|&v| v.max_data() * 8 >= segments.iter().map(|s| s.total_size_bits(v)).sum()) }
fn width(&self) -> u8 {