From 8ea0b6d5bef5e4f4637964c3b2cf732d9bf4f408 Mon Sep 17 00:00:00 2001 From: Danilo Krummrich Date: Mon, 25 May 2026 22:21:05 +0200 Subject: rust: pci: make Bar lifetime-parameterized Convert pci::Bar to pci::Bar<'a, SIZE>, storing &'a Device to tie the BAR mapping lifetime to the device. iomap_region_sized() now returns Result> directly instead of impl PinInit>, Error>. Since the lifetime ties the mapping to the device's bound state, callers no longer need Devres for the common case where the Bar lives in the driver's private data. Add Bar::into_devres() to consume the bar and register it as a device-managed resource, returning Devres>. The lifetime is erased to 'static because Devres guarantees the bar does not actually outlive the device -- access is revoked on unbind. Reviewed-by: Eliot Courtney Reviewed-by: Greg Kroah-Hartman Reviewed-by: Alexandre Courbot Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260525202921.124698-19-dakr@kernel.org Signed-off-by: Danilo Krummrich --- rust/kernel/devres.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'rust/kernel/devres.rs') diff --git a/rust/kernel/devres.rs b/rust/kernel/devres.rs index fd4633f977f6..82cbd8b969fb 100644 --- a/rust/kernel/devres.rs +++ b/rust/kernel/devres.rs @@ -304,7 +304,7 @@ impl Devres { /// pci, // /// }; /// - /// fn from_core(dev: &pci::Device>, devres: Devres>) -> Result { + /// fn from_core(dev: &pci::Device>, devres: Devres>) -> Result { /// let bar = devres.access(dev.as_ref())?; /// /// let _ = bar.read32(0x0); -- cgit v1.2.3