linux-kernel - [PATCH v2 0/4] dma-mapping: benchmark: fixes and error handling improvements

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Date: Sat,  4 May 2024 14:47:00 +0300
From: Fedor Pchelkin <pchelkin@...ras.ru>
To: Xiang Chen <chenxiang66@...ilicon.com>,
	Barry Song <21cnbao@...il.com>
Cc: Fedor Pchelkin <pchelkin@...ras.ru>,
	Christoph Hellwig <hch@....de>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Robin Murphy <robin.murphy@....com>,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Alexey Khoroshilov <khoroshilov@...ras.ru>,
	lvc-project@...uxtesting.org
Subject: [PATCH v2 0/4] dma-mapping: benchmark: fixes and error handling improvements

Some of the error paths inside do_map_benchmark() do not behave well.
There is also an insufficient node id validation and an out-of-bounds
access in NUMA_NO_NODE case.

Adjust these issues with the following patches.

Changelog
v2:
 * Rework kthread-related error handling patch (thanks to Robin Murphy) and
   merge patches 1/2 and 2/2 from v1 into a single patch - 1/4 in v2.
 * Three additional patches:
 * * Avoid needless copy_to_user if benchmark fails (suggested by Barry Song).
 * * Fix node id validation (found while testing the previous ones).
 * * Handle NUMA_NO_NODE correctly.
v1:
 * https://lore.kernel.org/linux-iommu/20240502161827.403338-1-pchelkin@ispras.ru/

Fedor Pchelkin (4):
  dma-mapping: benchmark: fix up kthread-related error handling
  dma-mapping: benchmark: avoid needless copy_to_user if benchmark fails
  dma-mapping: benchmark: fix node id validation
  dma-mapping: benchmark: handle NUMA_NO_NODE correctly

 kernel/dma/map_benchmark.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

-- 
2.45.0