diff --git a/src/backend/drm/atomic/surface.rs b/src/backend/drm/atomic/surface.rs
index 5e582df..9e467ce 100644
--- a/src/backend/drm/atomic/surface.rs
+++ b/src/backend/drm/atomic/surface.rs
@@ -144,7 +144,7 @@ impl<A: AsRawFd + 'static> AtomicDrmSurfaceInternal<A> {
         let pending = State {
             mode,
             blob,
-            connectors: connectors.into_iter().copied().collect(),
+            connectors: connectors.iter().copied().collect(),
         };
 
         let (primary, cursor) =
diff --git a/src/backend/drm/common/fallback.rs b/src/backend/drm/common/fallback.rs
index 3f13380..e5d666e 100644
--- a/src/backend/drm/common/fallback.rs
+++ b/src/backend/drm/common/fallback.rs
@@ -174,12 +174,12 @@ impl<A: AsRawFd + Clone + 'static> FallbackDevice<AtomicDrmDevice<A>, LegacyDrmD
         let log = crate::slog_or_stdlog(logger).new(o!("smithay_module" => "backend_drm_fallback"));
         info!(log, "Trying to initialize AtomicDrmDevice");
 
-        if env::var("SMITHAY_USE_LEGACY")
+        let force_legacy = env::var("SMITHAY_USE_LEGACY")
             .map(|x| {
                 x == "1" || x.to_lowercase() == "true" || x.to_lowercase() == "yes" || x.to_lowercase() == "y"
             })
-            .unwrap_or(false)
-        {
+            .unwrap_or(false);
+        if force_legacy {
             info!(log, "SMITHAY_USE_LEGACY is set. Forcing LegacyDrmDevice.");
             return Ok(FallbackDevice::Fallback(LegacyDrmDevice::new(
                 fd,
diff --git a/src/backend/drm/common/mod.rs b/src/backend/drm/common/mod.rs
index f9dd54c..c851e40 100644
--- a/src/backend/drm/common/mod.rs
+++ b/src/backend/drm/common/mod.rs
@@ -76,19 +76,16 @@ impl Into<SwapBuffersError> for Error {
     fn into(self) -> SwapBuffersError {
         match self {
             x @ Error::DeviceInactive => SwapBuffersError::TemporaryFailure(Box::new(x)),
-            Error::Access {
-                errmsg: _,
-                dev: _,
-                source,
-            } if match source.get_ref() {
-                drm::SystemError::Unknown {
-                    errno: nix::errno::Errno::EBUSY,
-                } => true,
-                drm::SystemError::Unknown {
-                    errno: nix::errno::Errno::EINTR,
-                } => true,
-                _ => false,
-            } =>
+            Error::Access { source, .. }
+                if match source.get_ref() {
+                    drm::SystemError::Unknown {
+                        errno: nix::errno::Errno::EBUSY,
+                    } => true,
+                    drm::SystemError::Unknown {
+                        errno: nix::errno::Errno::EINTR,
+                    } => true,
+                    _ => false,
+                } =>
             {
                 SwapBuffersError::TemporaryFailure(Box::new(source))
             }
diff --git a/src/backend/drm/gbm/mod.rs b/src/backend/drm/gbm/mod.rs
index 0c87bcf..d4cc66a 100644
--- a/src/backend/drm/gbm/mod.rs
+++ b/src/backend/drm/gbm/mod.rs
@@ -265,10 +265,10 @@ where
             Error::FrontBuffersExhausted => SwapBuffersError::AlreadySwapped,
             Error::FramebufferCreationFailed(x)
                 if match x.get_ref() {
-                    &drm::SystemError::Unknown {
+                    drm::SystemError::Unknown {
                         errno: nix::errno::Errno::EBUSY,
                     } => true,
-                    &drm::SystemError::Unknown {
+                    drm::SystemError::Unknown {
                         errno: nix::errno::Errno::EINTR,
                     } => true,
                     _ => false,
diff --git a/src/backend/drm/legacy/surface.rs b/src/backend/drm/legacy/surface.rs
index dbd61c9..de931da 100644
--- a/src/backend/drm/legacy/surface.rs
+++ b/src/backend/drm/legacy/surface.rs
@@ -358,7 +358,7 @@ impl<A: AsRawFd + 'static> LegacyDrmSurfaceInternal<A> {
         };
         let pending = State {
             mode,
-            connectors: connectors.into_iter().copied().collect(),
+            connectors: connectors.iter().copied().collect(),
         };
 
         let surface = LegacyDrmSurfaceInternal {
@@ -437,9 +437,10 @@ impl<A: AsRawFd + 'static> Drop for LegacyDrmSurfaceInternal<A> {
         let _ = self.set_cursor(self.crtc, Option::<&DumbBuffer>::None);
         // disable connectors again
         let current = self.state.read().unwrap();
-        if let Ok(_) = self
+        if self
             .dev
             .set_connector_state(current.connectors.iter().copied(), false)
+            .is_ok()
         {
             // null commit
             let _ = self.set_crtc(self.crtc, None, (0, 0), &[], None);
diff --git a/src/backend/egl/display.rs b/src/backend/egl/display.rs
index bc5d943..baf716b 100644
--- a/src/backend/egl/display.rs
+++ b/src/backend/egl/display.rs
@@ -304,7 +304,7 @@ impl<B: native::Backend, N: native::NativeDisplay<B>> EGLDisplay<B, N> {
             .collect::<Result<Vec<Option<ffi::egl::types::EGLConfig>>, EGLError>>()
             .map_err(Error::ConfigFailed)?
             .into_iter()
-            .flat_map(|x| x)
+            .flatten()
             .collect::<Vec<_>>();
 
         if config_ids.is_empty() {
@@ -546,7 +546,7 @@ impl EGLBufferReader {
             out.push(ffi::egl::NONE as i32);
 
             images.push({
-                let image = wrap_egl_call(|| unsafe {
+                wrap_egl_call(|| unsafe {
                     ffi::egl::CreateImageKHR(
                         **self.display,
                         ffi::egl::NO_CONTEXT,
@@ -555,8 +555,7 @@ impl EGLBufferReader {
                         out.as_ptr(),
                     )
                 })
-                .map_err(BufferAccessError::EGLImageCreationFailed)?;
-                image
+                .map_err(BufferAccessError::EGLImageCreationFailed)?
             });
         }