linux-kernel - [PATCH v2 0/4] dma-mapping: Trace more error paths

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Message-Id: <20241018150036.2878190-1-sean.anderson@linux.dev>
Date: Fri, 18 Oct 2024 11:00:33 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Christoph Hellwig <hch@....de>,
	iommu@...ts.linux.dev
Cc: Robin Murphy <robin.murphy@....com>,
	linux-trace-kernel@...r.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-kernel@...r.kernel.org,
	Sean Anderson <sean.anderson@...ux.dev>
Subject: [PATCH v2 0/4] dma-mapping: Trace more error paths

Some DMA functions are not traced when they fail. I found this pretty
confusing, since it seems like the device skips calling the DMA function
and fails anyway. This series adds some additional tracepoints to
address this.

Changes in v2:
- Use macros to define events in a class

Sean Anderson (4):
  dma-mapping: Use macros to define events in a class
  dma-mapping: Trace dma_alloc/free direction
  dma-mapping: Use trace_dma_alloc for dma_alloc* instead of using
    trace_dma_map
  dma-mapping: Trace more error paths

 include/trace/events/dma.h | 213 ++++++++++++++++++++++++++++++-------
 kernel/dma/mapping.c       |  37 ++++---
 2 files changed, 198 insertions(+), 52 deletions(-)

-- 
2.35.1.1320.gc452695387.dirty