On 2020/8/4 6:59, David Miller wrote:
From: Jia-Ju Bai <baiji...@tsinghua.edu.cn>
Date: Sun, 2 Aug 2020 21:11:07 +0800
In vmxnet3_probe_device(), "adapter" is mapped to streaming DMA:
adapter->adapter_pa = dma_map_single(..., adapter, ...);
Then "adapter" is accessed at many places in this function.
Theses accesses may cause data inconsistency between CPU cache and
hardware.
To fix this problem, dma_map_single() is called after these accesses.
Signed-off-by: Jia-Ju Bai <baiji...@tsinghua.edu.cn>
'adapter' is accessed everywhere, in the entire driver, not just here
in the probe function.
Okay, replacing dma_map_single() with dma_alloc_coherent() may be better.
If you think this solution is okay, I can submit a new patch.
Best wishes,
Jia-Ju Bai
