rust: pci: make Driver trait lifetime-parameterized

Add a 'bound lifetime to the associated Data, changing type Data to type
Data<'bound>.

This allows the driver's bus device private data to capture the device /
driver bound lifetime; device resources can be stored directly by
reference rather than requiring Devres.

The probe() and unbind() callbacks thus gain a 'bound lifetime parameter
on the methods themselves; avoiding a global lifetime on the trait impl.

Existing drivers set type Data<'bound> = Self, preserving the current
behavior.

Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260525202921.124698-13-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/gpu/nova-core/driver.rs b/drivers/gpu/nova-core/driver.rs
index 13c5ff15e87f..6ad1a856694c 100644
--- a/drivers/gpu/nova-core/driver.rs
+++ b/drivers/gpu/nova-core/driver.rs
@@ -74,10 +74,13 @@ kernel::pci_device_table!(
 
 impl pci::Driver for NovaCore {
     type IdInfo = ();
-    type Data = Self;
+    type Data<'bound> = Self;
     const ID_TABLE: pci::IdTable<Self::IdInfo> = &PCI_TABLE;
 
-    fn probe(pdev: &pci::Device<Core<'_>>, _info: &Self::IdInfo) -> impl PinInit<Self, Error> {
+    fn probe<'bound>(
+        pdev: &'bound pci::Device<Core<'_>>,
+        _info: &'bound Self::IdInfo,
+    ) -> impl PinInit<Self, Error> + 'bound {
         pin_init::pin_init_scope(move || {
             dev_dbg!(pdev, "Probe Nova Core GPU driver.\n");
 
@@ -109,7 +112,7 @@ impl pci::Driver for NovaCore {
         })
     }
 
-    fn unbind(pdev: &pci::Device<Core<'_>>, this: Pin<&Self>) {
+    fn unbind<'bound>(pdev: &'bound pci::Device<Core<'_>>, this: Pin<&Self>) {
         this.gpu.unbind(pdev.as_ref());
     }
 }