lanzaboote: fix clippy issues

rust/lanzaboote/src/linux_loader.rs

@@ -147,16 +147,16 @@ fn initrd_location(initrd_efi: &mut RegularFile) -> Result<Range<usize>> {
         .sections
         .iter()
         .find(|s| s.name().unwrap() == ".initrd")
-        .and_then(|s| {
+        .map(|s| {
             let section_start: usize = s.pointer_to_raw_data.try_into().unwrap();
             let section_size: usize = s.size_of_raw_data.try_into().unwrap();
 
-            Some(Range {
+            Range {
                 start: section_start,
                 end: section_start + section_size,
-            })
+            }
         })
-        .ok_or(Status::END_OF_FILE.into())
+        .ok_or_else(|| Status::END_OF_FILE.into())
 }
 
 /// Check the signature of the initrd.

rust/lanzaboote/src/pe_section.rs

@@ -1,3 +1,9 @@
+// Clippy doesn't like the lifetimes, but rustc wants them. 🤷
+#![allow(clippy::needless_lifetimes)]
+// Clippy doesn't understand that we exit with ? from the closure in
+// and_then below and this can't be expressed with map.
+#![allow(clippy::bind_instead_of_map)]
+
 use alloc::{borrow::ToOwned, string::String};
 
 /// Extracts the data of a section of a PE file.
@@ -20,6 +26,5 @@ pub fn pe_section<'a>(file_data: &'a [u8], section_name: &str) -> Option<&'a [u8
 
 /// Extracts the data of a section of a PE file and returns it as a string.
 pub fn pe_section_as_string<'a>(file_data: &'a [u8], section_name: &str) -> Option<String> {
-    pe_section(file_data, section_name)
-        .and_then(|data| Some(core::str::from_utf8(data).unwrap().to_owned()))
+    pe_section(file_data, section_name).map(|data| core::str::from_utf8(data).unwrap().to_owned())
 }