fix ioctl(KIOEN) being unhandled in grlib/mcxn94x-multi #553
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Hello @adamgreloch, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
Summary of Changes
Hello, gemini-code-assist here, providing a summary of this pull request. This PR addresses an issue where the ioctl(KIOEN) request was not being handled by the UART drivers for the grlib-multi and mcxn94x-multi platforms. The changes introduce specific logic within the UART device control handlers to intercept the KIOEN request and use it to enable or disable kernel logging via the libklog_enable function. This functionality is restricted to the UART device configured as the console.
Highlights
- Handle KIOEN ioctl: The primary change is the addition of specific handling for the
KIOENioctl request within the UART device control message processing. - Kernel Log Control: The
KIOENioctl is now used to control the state (enable/disable) of kernel logging by callinglibklog_enable. - Console UART Specific: The
KIOENfunctionality is intentionally limited to only affect the UART device that is configured as the system console.
Changelog
- multi/grlib-multi/uart.c
- Added include for
<libklog.h>on line 21. - Modified the
uart_ioctlfunction (lines 339-354) to check if the request isKIOEN. If so, it callslibklog_enableif the device is the console UART, otherwise returns-EINVAL. If notKIOEN, it falls back tolibtty_ioctl.
- Added include for
- multi/mcxn94x-multi/uart.c
- Modified the
uart_handleMsgfunction within themtDevCtlcase (lines 352-363) to check if the request isKIOEN. If so, it callslibklog_enableif the minor device corresponds to the console UART, otherwise returns-EINVAL. If notKIOEN, it falls back tolibtty_ioctl.
- Modified the
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An ioctl call,
Unandled, caused a fall.
Now KIOEN works,
Fixing all the quirks,
Logging stands up tall.
Footnotes
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Code Review
This pull request introduces handling for the KIOEN ioctl command in the UART drivers for grlib-multi and mcxn94x-multi. The changes allow enabling or disabling kernel log output via this ioctl, specifically on designated console UARTs. The core logic added to both drivers appears sound and correctly restricts the KIOEN functionality to the appropriate console device.
I have a couple of points for clarification and a request regarding the pull request description.
Summary of Findings
- Pull Request Description: The pull request description template is currently unfilled. Providing details on the motivation, context (e.g., what issue does unhandled KIOEN cause?), and testing methodology would greatly benefit the review process and future maintainability.
- Clarity of
KIOENioctl argument: The code uses(int)(intptr_t)inDatato pass the argument tolibklog_enable(). While this is a common pattern for ioctls passing small integer values, it would be good to confirm this is the intended contract for theKIOENioctl's input data.
Merge Readiness
The code changes themselves for handling KIOEN appear logically sound and correctly implemented for both UART drivers. However, before merging, I recommend addressing the following:
- Complete the Pull Request Description: Please fill in the template with details about the motivation, context, and testing for this change.
- Clarify
inDataConvention (Optional but Recommended): A brief confirmation or pointer to documentation regarding the expected format ofinDataforKIOENwould be helpful for future reference, though the current implementation follows a common pattern.
Due to the incomplete pull request description, I am requesting changes. I am not authorized to approve pull requests; please ensure further review and approval as per your team's policy once the requested information is provided.
JIRA: RTOS-1034
JIRA: RTOS-1034
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Unit Test Results7 958 tests 7 434 ✅ 40m 36s ⏱️ Results for commit 7444c85. ♻️ This comment has been updated with latest results. |
JIRA: RTOS-1034
JIRA: RTOS-1034
Description
Motivation and Context
Types of changes
How Has This Been Tested?
Checklist:
Special treatment