scripts: generate_rust_analyzer: Handle sub-modules with no Makefile

[ Upstream commit 5c7548d5a25306dcdb97689479be81cacc8ce596 ]

More complex drivers might want to use modules to organize their Rust
code, but those module folders do not need a Makefile.
generate_rust_analyzer.py currently crashes on those. Fix it so that a
missing Makefile is silently ignored.

Link: https://github.com/Rust-for-Linux/linux/pull/883
Signed-off-by: Asahi Lina <lina@asahilina.net>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Stable-dep-of: 2e0f91aba507 ("scripts: generate_rust_analyzer: add missing macros deps")
Signed-off-by: Sasha Levin <sashal@kernel.org>

scripts/generate_rust_analyzer.py

@@ -98,8 +98,11 @@ def generate_crates(srctree, objtree, sysroot_src):
             name = path.name.replace(".rs", "")
 
             # Skip those that are not crate roots.
+            try:
                 if f"{name}.o" not in open(path.parent / "Makefile").read():
                     continue
+            except FileNotFoundError:
+                continue
 
             logging.info("Adding %s", name)
             append_crate(