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SubjectRe: [PATCH] net: vmxnet3: avoid accessing the data mapped to streaming DMA
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From: Jia-Ju Bai <baijiaju@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 <baijiaju@tsinghua.edu.cn>

'adapter' is accessed everywhere, in the entire driver, not just here
in the probe function.

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