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From: Alexandre Courbot <acourbot@nvidia.com>
To: Danilo Krummrich <dakr@kernel.org>,
	Alice Ryhl <aliceryhl@google.com>,
	 David Airlie <airlied@gmail.com>,
	Simona Vetter <simona@ffwll.ch>
Cc: John Hubbard <jhubbard@nvidia.com>,
	 Alistair Popple <apopple@nvidia.com>,
	 Joel Fernandes <joelagnelf@nvidia.com>,
	Timur Tabi <ttabi@nvidia.com>,  Edwin Peer <epeer@nvidia.com>,
	nouveau@lists.freedesktop.org,  dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org,  rust-for-linux@vger.kernel.org,
	Alexandre Courbot <acourbot@nvidia.com>
Subject: [PATCH 9/9] gpu: nova-core: simplify str_from_null_terminated
Date: Mon, 08 Dec 2025 18:27:01 +0900	[thread overview]
Message-ID: <20251208-nova-misc-v1-9-a3ce01376169@nvidia.com> (raw)
In-Reply-To: <20251208-nova-misc-v1-0-a3ce01376169@nvidia.com>

The core library's `CStr` has a `from_bytes_until_nul` method that we
can leverage to simplify this function.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
 drivers/gpu/nova-core/util.rs | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/nova-core/util.rs b/drivers/gpu/nova-core/util.rs
index 8b2a4b99c55b..2cccbce78c14 100644
--- a/drivers/gpu/nova-core/util.rs
+++ b/drivers/gpu/nova-core/util.rs
@@ -2,15 +2,10 @@
 
 /// Converts a null-terminated byte slice to a string, or `None` if the array does not
 /// contains any null byte or contains invalid characters.
-///
-/// Contrary to [`core::ffi::CStr::from_bytes_with_nul`], the null byte can be anywhere in the
-/// slice, and not only in the last position.
 pub(crate) fn str_from_null_terminated(bytes: &[u8]) -> Option<&str> {
     use core::ffi::CStr;
 
-    bytes
-        .iter()
-        .position(|&b| b == 0)
-        .and_then(|null_pos| CStr::from_bytes_with_nul(&bytes[..=null_pos]).ok())
+    CStr::from_bytes_until_nul(bytes)
+        .ok()
         .and_then(|cstr| cstr.to_str().ok())
 }

-- 
2.52.0


  parent reply	other threads:[~2025-12-08  9:27 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-12-08  9:26 [PATCH 0/9] gpu: nova-core: miscellaneous improvements Alexandre Courbot
2025-12-08  9:26 ` [PATCH 1/9] gpu: nova-core: gsp: warn if data remains after processing a message Alexandre Courbot
2025-12-11 21:59   ` lyude
2025-12-08  9:26 ` [PATCH 2/9] gpu: nova-core: gsp: remove unnecessary Display impls Alexandre Courbot
2025-12-09  1:26   ` Alistair Popple
2025-12-11 22:02   ` lyude
2025-12-08  9:26 ` [PATCH 3/9] gpu: nova-core: gsp: simplify sequencer opcode parsing Alexandre Courbot
2025-12-11 22:04   ` lyude
2025-12-08  9:26 ` [PATCH 4/9] gpu: nova-core: gsp: remove unneeded sequencer trait Alexandre Courbot
2025-12-11 22:06   ` lyude
2025-12-08  9:26 ` [PATCH 5/9] gpu: nova-core: gsp: derive `Debug` on more sequencer types Alexandre Courbot
2025-12-11 22:06   ` lyude
2025-12-08  9:26 ` [PATCH 6/9] gpu: nova-core: gsp: derive Zeroable for GspStaticConfigInfo Alexandre Courbot
2025-12-11 22:07   ` lyude
2025-12-08  9:26 ` [PATCH 7/9] gpu: nova-core: firmware: fwsec: do not require bound device when unneeded Alexandre Courbot
2025-12-08 16:18   ` Timur Tabi
2025-12-08 16:51     ` John Hubbard
2025-12-08 17:55       ` Timur Tabi
2025-12-09  2:30         ` Alexandre Courbot
2025-12-11 22:08   ` lyude
2025-12-08  9:27 ` [PATCH 8/9] gpu: nova-core: use core library's CStr instead of kernel one Alexandre Courbot
2025-12-11 22:09   ` lyude
2025-12-08  9:27 ` Alexandre Courbot [this message]
2025-12-11 22:10   ` [PATCH 9/9] gpu: nova-core: simplify str_from_null_terminated lyude

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