Re: [PATCH] serial: qcom-geni: Add tracepoints for SE reg dump

[sashiko-bot@kernel.org]

> The GENI serial driver reports various transfer failures such as
> M_CMD abort/cancel timeouts, DMA TX/RX FSM reset timeouts, RX FIFO
> write errors, illegal command interrupts, and DMA parity errors.
> However, diagnosing the root cause of these failures is difficult as
> the hardware state is not captured when the error occurs.
> 
> Add trace_geni_se_regs() calls at critical serial error handling paths
> to automatically capture GENI serial engine debug registers when
> failures are detected. This includes:
> 
> - M_CMD abort/cancel timeout
> - DMA TX/RX FSM reset timeout
> - Unexpected zero-byte RX DMA completion
> - RX FIFO write error and illegal command interrupt status
> - RX DMA parity error
> 
> Dumping the SE debug registers at the time of failure provides
> additional hardware context and significantly improves post-mortem
> analysis of serial transfer issues without affecting normal
> operation.
> 
> Signed-off-by: Praveen Talari <praveen.talari@oss.qualcomm.com>

Sashiko has reviewed this patch and found no issues.

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Sashiko AI review · https://sashiko.dev/#/patchset/20261019-add-tracepoints-for-se-reg-dump-uart-v1-1-1fb47b1605b9@oss.qualcomm.com?part=1