From 413a840d0b9b786b15af693d285a705f117aa2af Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Fri, 29 Apr 2022 12:57:14 +0530
Subject: [PATCH 1/2] gpio: Fix get_config()

get_config() must return only the relevant part of the config, as
requested by the caller, instead of returning entire config structure.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 gpio/src/gpio.rs     |  6 ++++--
 gpio/src/vhu_gpio.rs | 29 ++++++++++++++++++-----------
 2 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/gpio/src/gpio.rs b/gpio/src/gpio.rs
index 0a6f3ca..f14bfb3 100644
--- a/gpio/src/gpio.rs
+++ b/gpio/src/gpio.rs
@@ -14,7 +14,7 @@ use libgpiod::{
     RequestConfig,
 };
 use thiserror::Error as ThisError;
-use vm_memory::{Le16, Le32};
+use vm_memory::{ByteValued, Le16, Le32};
 
 type Result<T> = std::result::Result<T, Error>;
 
@@ -79,7 +79,7 @@ const VIRTIO_GPIO_IRQ_TYPE_ALL: u16 = VIRTIO_GPIO_IRQ_TYPE_EDGE_BOTH
     | VIRTIO_GPIO_IRQ_TYPE_LEVEL_LOW;
 
 /// Virtio GPIO Configuration
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, Default, PartialEq)]
 #[repr(C)]
 pub(crate) struct VirtioGpioConfig {
     pub(crate) ngpio: Le16,
@@ -87,6 +87,8 @@ pub(crate) struct VirtioGpioConfig {
     pub(crate) gpio_names_size: Le32,
 }
 
+unsafe impl ByteValued for VirtioGpioConfig {}
+
 /// Trait that represents an GPIO Device.
 ///
 /// This trait is introduced for development purposes only, and should not
diff --git a/gpio/src/vhu_gpio.rs b/gpio/src/vhu_gpio.rs
index 5f82def..67774f5 100644
--- a/gpio/src/vhu_gpio.rs
+++ b/gpio/src/vhu_gpio.rs
@@ -27,7 +27,7 @@ use vm_memory::{
 use vmm_sys_util::epoll::EventSet;
 use vmm_sys_util::eventfd::{EventFd, EFD_NONBLOCK};
 
-use crate::gpio::{GpioController, GpioDevice, VirtioGpioConfig, VIRTIO_GPIO_IRQ_TYPE_NONE};
+use crate::gpio::{GpioController, GpioDevice, VIRTIO_GPIO_IRQ_TYPE_NONE};
 
 /// Possible values of the status field
 const VIRTIO_GPIO_STATUS_OK: u8 = 0x0;
@@ -394,11 +394,15 @@ impl<D: 'static + GpioDevice + Sync + Send> VhostUserBackendMut<VringRwLock, ()>
         VhostUserProtocolFeatures::MQ | VhostUserProtocolFeatures::CONFIG
     }
 
-    fn get_config(&self, _offset: u32, _size: u32) -> Vec<u8> {
+    fn get_config(&self, offset: u32, size: u32) -> Vec<u8> {
         unsafe {
             from_raw_parts(
-                self.controller.get_config() as *const _ as *const _,
-                size_of::<VirtioGpioConfig>(),
+                self.controller
+                    .get_config()
+                    .as_slice()
+                    .as_ptr()
+                    .offset(offset as isize) as *const _ as *const _,
+                size as usize,
             )
             .to_vec()
         }
@@ -1110,13 +1114,16 @@ mod tests {
             gpio_names_size: From::from(names_size as u32),
         };
 
-        assert_eq!(backend.get_config(0, 0), unsafe {
-            from_raw_parts(
-                &config as *const _ as *const _,
-                size_of::<VirtioGpioConfig>(),
-            )
-            .to_vec()
-        });
+        assert_eq!(
+            backend.get_config(0, size_of::<VirtioGpioConfig>() as u32),
+            unsafe {
+                from_raw_parts(
+                    &config as *const _ as *const _,
+                    size_of::<VirtioGpioConfig>(),
+                )
+                .to_vec()
+            }
+        );
 
         let mem = GuestMemoryAtomic::new(
             GuestMemoryMmap::<()>::from_ranges(&[(GuestAddress(0), 0x1000)]).unwrap(),

From 9e0ec79cdccc117305243f26cc064c717206f226 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 2 May 2022 04:08:36 +0000
Subject: [PATCH 2/2] build(deps): bump syn from 1.0.91 to 1.0.92

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.91 to 1.0.92.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/1.0.91...1.0.92)

---
updated-dependencies:
- dependency-name: syn
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 Cargo.lock | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 0484ade..85f151e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -352,9 +352,9 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "1.0.91"
+version = "1.0.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b683b2b825c8eef438b77c36a06dc262294da3d5a5813fac20da149241dcd44d"
+checksum = "7ff7c592601f11445996a06f8ad0c27f094a58857c2f89e97974ab9235b92c52"
 dependencies = [
  "proc-macro2",
  "quote",