Re: [PATCH v6] i3c: Add NULL pointer check in i3c_master_queue_ibi()

On Wed, 26 Mar 2025 18:00:46 +0530, Manjunatha Venkatesh wrote:

The I3C master driver may receive an IBI from a target device that has not been probed yet. In such cases, the master calls `i3c_master_queue_ibi()` to queue an IBI work task, leading to "Unable to handle kernel read from unreadable memory" and resulting in a kernel panic.

Typical IBI handling flow:

1. The I3C master scans target devices and probes their respective drivers.
2. The target device driver calls `i3c_device_request_ibi()` to enable IBI and assigns `dev->ibi = ibi`.
3. The I3C master receives an IBI from the target device and calls `i3c_master_queue_ibi()` to queue the target device driver’s IBI handler task.

[...]

Applied, thanks!

[1/1] i3c: Add NULL pointer check in i3c_master_queue_ibi() https://git.kernel.org/abelloni/c/bd496a44f041

Best regards,