treewide: bump to MSRV 1.91

Required by some of our new deps. Rust 1.91 was released on October 30th
2025, so 7 months ago.

Cargo.toml

@@ -17,7 +17,7 @@ edition = "2024"
 keywords = ["uefi", "efi"]
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-osdev/uefi-rs"
-rust-version = "1.88"
+rust-version = "1.91"
 
 [workspace.dependencies]
 bitflags = "2.0.0"

uefi-macros/CHANGELOG.md

@@ -3,7 +3,7 @@
 ## Added
 
 ## Changed
-
+- MSRV increased from 1.88 to 1.91.
 
 # uefi-macros - v0.19 (2025-10-21)
 

uefi/CHANGELOG.md

@@ -4,6 +4,7 @@
 - Added `proto::console::text::InputEx`.
 
 ## Changed
+- MSRV increased from 1.88 to 1.91.
 - **Breaking:** The variants of `TimerTrigger` now hold a `Duration`
 - **Breaking:** The `driver_image` parameter of `boot::connect_controller` is
   now a `None`-terminated slice. Callers that previously passed `None` for this

uefi/src/proto/network/pxe.rs

@@ -484,8 +484,9 @@ impl BaseCode {
 
         // Translate IP types back into the higher-level types.
         let fn_replace_ip = |core_ip: &mut Option<&mut IpAddr>, efi_ip: Option<EfiIpAddr>| {
-            // TODO use let-chain once we are on MSRV 1.88
-            if let (Some(core_ip_location), Some(efi_ip)) = (core_ip, efi_ip) {
+            if let Some(core_ip_location) = core_ip
+                && let Some(efi_ip) = efi_ip
+            {
                 // SAFETY: We trust that `using_ipv6()` tells the truth.
                 let core_ip = unsafe { efi_ip.into_core_addr(self.mode().using_ipv6()) };
                 **core_ip_location = core_ip;