Merge tag 'driver-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core updates from Danilo Krummrich:
 "Core:

   - Add TAINT_FORCED_BIND to taint the kernel and driver module before
     manual sysfs bind/unbind operations; make add_taint_module()
     available to driver core and update taint decoding tools and
     documentation

   - Constify device_show/store_*() attribute parameters and adapt x86
     MCE and perf users to prepare for const dev_ext_attribute instances

   - Fix UAF in NUMA access node registration failure handling by
     dropping the device reference with put_device() instead of directly
     freeing the node

  debugfs:

   - Make debugfs_create_str() read-only to eliminate double-free races
     between concurrent writers; reject writable modes; convert
     interconnect and SoundWire users to local file operations with
     mutex-protected strings

  kobject:

   - Fix out-of-bounds access in kobject_action_type() when parsing
     action strings containing embedded NUL bytes

   - Fix the kobject_set_name() reference in kset_register() kernel-doc

  Rust:

   - DMA:

      - Tie Coherent, CoherentBox and CoherentHandle to the device's
        bound lifetime to prevent retaining DMA allocations beyond
        driver unbind; propagate the lifetime through nova-core and the
        DMA sample driver

   - I/O:

      - Require explicit base types for registers and replace relative
        registers with typed subregion projections; reimplement
        register!() as a proc macro, support registers using existing
        types without inline bitfields, and convert nova-core, Tyr and
        the PCI sample; add AsRepr/AsReprMut and transmute helpers with
        deferred size checks for representation conversions

      - Wrap ResourceSize in a transparent newtype with explicit
        conversions, including checked conversion to usize

   - PCI:

      - Add typed PCIe extended capability lookup and SR-IOV accessors
        for the First VF Offset and decoded VF BAR addresses and widths,
        keeping raw SR-IOV registers private to preserve PCI core
        ownership of their state

   - scatterlist:

      - Honor the device's maximum segment size as well as the DMA
        mapping limit when constructing SG tables

      - Return u32 from SGEntry::dma_len() to match the C segment length
        type

   - misc:

      - Validate auxiliary DeviceId name length explicitly to improve
        compile-time diagnostics for oversized device ID table entries

      - Drop unnecessary 'static bounds from debugfs ScopedDir file
        creation methods to support data containing non-'static
        references, including DMA buffers

  Misc:

   - Add Johan Hovold as driver core maintainer

   - Simplify platform_device_alloc() by returning early on allocation
     failure

   - Fix typos in driver core and kernfs comments"

* tag 'driver-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (41 commits)
  rust: pci: add extended capability and SR-IOV support
  kobject: Fix the kobj_set_name reference in kset_register() kernel-doc
  rust: io: convert ResourceSize into a transparent newtype
  rust: scatterlist: return u32 from SGEntry::dma_len()
  MAINTAINERS: add myself as driver core maintainer
  debugfs: make debugfs_create_str() read-only
  soundwire: debugfs: replace writable string helper
  interconnect: debugfs: replace writable string helper
  docs: admin-guide: Handle TAINT_FORCED_BIND when parsing /proc/sys/kernel/tainted
  driver core: platform: Simplify platform_device_alloc()
  kobject: fix out-of-bounds access in kobject_action_type()
  rust: scatterlist: honor the device's maximum segment size
  driver core: add TAINT_FORCED_BIND for when userspace manually messes with devices and drivers
  module: fix up documentation for add_taint() and add_taint_module()
  module: pull out add_taint_module() to be public
  driver core: Constify the signature of device_show/store_*()
  drivers: perf: Use __DEVICE_ATTR() macro to initialize dev_ext_attribute
  x86/mce: Use __DEVICE_ATTR() macro to initialize dev_ext_attribute
  rust: auxiliary: validate DeviceId name length
  driver core: fix typos in comments
  ...

2 files changed, 21 insertions, 13 deletions

diff --git a/samples/rust/rust_dma.rs b/samples/rust/rust_dma.rs
index bd60034ded23..ffb693544673 100644
--- a/samples/rust/rust_dma.rs
+++ b/samples/rust/rust_dma.rs
@@ -5,7 +5,10 @@
 //! To make this driver probe, QEMU must be run with `-device pci-testdev`.
 
 use kernel::{
-    device::Core,
+    device::{
+        Bound,
+        Core, //
+    },
     dma::{
         Coherent,
         DataDirection,
@@ -23,14 +26,15 @@ use kernel::{
     scatterlist::{
         Owned,
         SGTable, //
-    },
-    sync::aref::ARef, //
+    }, //
 };
 
+struct DmaSampleDriver;
+
 #[pin_data(PinnedDrop)]
-struct DmaSampleDriver {
-    pdev: ARef<pci::Device>,
-    ca: Coherent<[MyStruct]>,
+struct DmaSampleData<'bound> {
+    pdev: &'bound pci::Device<Bound>,
+    ca: Coherent<'bound, [MyStruct]>,
     #[pin]
     sgt: SGTable<Owned<VVec<u8>>>,
 }
@@ -67,13 +71,13 @@ kernel::pci_device_table!(
 
 impl pci::Driver for DmaSampleDriver {
     type IdInfo = ();
-    type Data<'bound> = Self;
+    type Data<'bound> = DmaSampleData<'bound>;
     const ID_TABLE: pci::IdTable<Self::IdInfo> = &PCI_TABLE;
 
     fn probe<'bound>(
         pdev: &'bound pci::Device<Core<'_>>,
         _info: Option<&'bound Self::IdInfo>,
-    ) -> impl PinInit<Self, Error> + 'bound {
+    ) -> impl PinInit<Self::Data<'bound>, Error> + 'bound {
         pin_init::pin_init_scope(move || {
             dev_info!(pdev, "Probe DMA test driver.\n");
 
@@ -82,7 +86,7 @@ impl pci::Driver for DmaSampleDriver {
             // SAFETY: There are no concurrent calls to DMA allocation and mapping primitives.
             unsafe { pdev.dma_set_mask_and_coherent(mask)? };
 
-            let ca: Coherent<[MyStruct]> =
+            let ca: Coherent<'_, [MyStruct]> =
                 Coherent::zeroed_slice(pdev.as_ref(), TEST_VALUES.len(), GFP_KERNEL)?;
 
             for (i, value) in TEST_VALUES.into_iter().enumerate() {
@@ -94,8 +98,8 @@ impl pci::Driver for DmaSampleDriver {
 
             let sgt = SGTable::new(pdev.as_ref(), pages, DataDirection::ToDevice, GFP_KERNEL);
 
-            Ok(try_pin_init!(Self {
-                pdev: pdev.into(),
+            Ok(try_pin_init!(Self::Data {
+                pdev,
                 ca,
                 sgt <- sgt,
             }))
@@ -103,7 +107,7 @@ impl pci::Driver for DmaSampleDriver {
     }
 }
 
-impl DmaSampleDriver {
+impl DmaSampleData<'_> {
     fn check_dma(&self) {
         for (i, value) in TEST_VALUES.into_iter().enumerate() {
             let val0 = io_read!(self.ca, [panic: i].h);
@@ -116,7 +120,7 @@ impl DmaSampleDriver {
 }
 
 #[pinned_drop]
-impl PinnedDrop for DmaSampleDriver {
+impl PinnedDrop for DmaSampleData<'_> {
     fn drop(self: Pin<&mut Self>) {
         dev_info!(self.pdev, "Unload DMA test driver.\n");
 
diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci.rs
index 2282191e6292..13b035a95756 100644
--- a/samples/rust/rust_driver_pci.rs
+++ b/samples/rust/rust_driver_pci.rs
@@ -23,6 +23,8 @@ mod regs {
     use super::*;
 
     register! {
+        base: kernel::io::Region<END>;
+
         pub(super) TEST(u8) @ 0x0 {
             7:0 index => TestIndex;
         }
@@ -102,6 +104,8 @@ impl SampleDriverData<'_> {
 
         // Some PCI configuration space registers.
         register! {
+            base: pci::Normal;
+
             VENDOR_ID(u16) @ 0x0 {
                 15:0 vendor_id;
             }