iio: proximity: isl29501: Fix return type of isl29501_register_writegrafted

isl29501_register_write() was returning a u32 instead of an int.
Since the function returns negative error codes (such as -ERANGE or
return values from i2c_smbus_write_byte_data()), returning an unsigned
integer type prevents callers from correctly checking for negative error
conditions.

Fix this by changing the function return type from u32 to int.

This was found through manual code review.

Fixes: 1c28799257bc ("iio: light: isl29501: Add support for the ISL29501 ToF sensor.")
Signed-off-by: Salah Triki <salah.triki@gmail.com>
Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/Documentation/process/coding-assistants.rst b/Documentation/process/coding-assistants.rst
new file mode 100644
index 000000000..051f0d819
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+++ b/Documentation/process/coding-assistants.rst
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+.. SPDX-License-Identifier: GPL-2.0
+
+.. _coding_assistants:
+
+AI Coding Assistants
+++++++++++++++++++++
+
+This document provides guidance for AI tools and developers using AI
+assistance when contributing to the Linux kernel.
+
+AI tools helping with Linux kernel development should follow the standard
+kernel development process:
+
+* Documentation/process/development-process.rst
+* Documentation/process/coding-style.rst
+* Documentation/process/submitting-patches.rst
+
+For guidelines on content generated by AI coding assistants see:
+
+* Documentation/process/generated-content.rst
+
+Licensing and Legal Requirements
+================================
+
+All contributions must comply with the kernel's licensing requirements:
+
+* All code must be compatible with GPL-2.0-only
+* Use appropriate SPDX license identifiers
+* See Documentation/process/license-rules.rst for details
+
+Signed-off-by and Developer Certificate of Origin
+=================================================
+
+AI agents MUST NOT add Signed-off-by tags. Only humans can legally
+certify the Developer Certificate of Origin (DCO). The human submitter
+is responsible for:
+
+* Reviewing all AI-generated code
+* Ensuring compliance with licensing requirements
+* Adding their own Signed-off-by tag to certify the DCO
+* Taking full responsibility for the contribution
+
+Attribution
+===========
+
+When AI tools contribute to kernel development, proper attribution
+helps track the evolving role of AI in the development process.
+Contributions should include an Assisted-by tag in the following format::
+
+  Assisted-by: LLM [TOOL1] [TOOL2]
+
+* ``[TOOL1] [TOOL2]`` are optional specialized analysis tools used
+  (e.g., coccinelle, sparse, smatch, clang-tidy)
+
+Basic development tools (git, gcc, make, editors) should not be listed.
+
+Example::
+
+  Assisted-by: LLM coccinelle sparse
+
+Procedure for finding and fixing bugs
+=====================================
+
+When an AI assistant is used to find and fix bugs, it **MUST** follow at least
+these steps:
+
+1. Before starting, read the whole process documentation listed above, as well
+   as any other document mentioned in the request. Do not rely on isolated
+   parts found by keyword search.
+2. Note the commit ID and Locate a bug as instructed.
+3. For any bug found that is not trivial, verify that it looks real by
+   attempting to create a reproducer to demonstrate it. Lacking it may cause
+   the report to be ignored, as many unverified bug reports sent to maintainers
+   happen to be invalid. Stop here if it finally looks wrong.
+4. Write a fix for the bug. This part is not optional: except in a few very
+   rare cases, an AI assistant able to find a bug is able to fix it. Note that
+   fixes written in the same session as used to find the bug will generally
+   lead to better and more accurate fixes as the LLM's reasoning context
+   remains present.
+5. Build and verify that the fix works either using the reproducer or by
+   re-running a complete analysis; drop any fix that doesn't work and try
+   another one. The fix must not add build warnings and must pass the
+   checkpatch.pl checks (see submitting-patches.rst).
+6. Commit the working fix with a detailed message describing the problem, the
+   solution and a Fixes tag. Do not add a Signed-off-by tag, and add an
+   Assisted-by tag, as described above.
+7. Identify the maintainers and lists using scripts/get_maintainer.pl.
+   Documentation/process/security-bugs.rst shows how to do that.
+8. Indicate what could not be done. If the fix could not be built or tested, or
+   if no reproducer could be produced, say so explicitly: maintainers currently
+   waste too much time analyzing unverified reports and untested fixes.
+9. Read Documentation/process/threat-model.rst to determine whether the bug is
+   a vulnerability or a regular bug, and leave the result to the reporter for
+   review (the assistant must never send anything itself). Regular bugs are
+   submitted as described in Documentation/process/submitting-patches.rst,
+   vulnerabilities as described in Documentation/process/security-bugs.rst.