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dma-trace: Preserve logs while dtrace is disabled #5397

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Merged
lgirdwood merged 1 commit into from
Feb 22, 2022
Merged

dma-trace: Preserve logs while dtrace is disabled #5397

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10 changes: 10 additions & 0 deletions src/trace/dma-trace.c
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Original file line number Diff line number Diff line change
Expand Up @@ -491,6 +491,8 @@ int dma_trace_enable(struct dma_trace_data *d)

void dma_trace_disable(struct dma_trace_data *d)
{
struct dma_trace_buf *buffer = &d->dmatb;

/* cancel trace work */
schedule_task_cancel(&d->dmat_work);

Expand All @@ -507,6 +509,14 @@ void dma_trace_disable(struct dma_trace_data *d)
d->host_size = 0;
}
#endif

/*
* Reset the local read and write pointers to preserve the captured logs
* while the dtrace is disabed
*/
buffer->w_ptr = buffer->addr;
buffer->r_ptr = buffer->addr;
buffer->avail = 0;
}

/** Sends all pending DMA messages to mailbox (for emergencies) */
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