Re: [PATCH] net: vmxnet3: avoid accessing the data mapped to streaming DMA

[David Miller]

From: Jia-Ju Bai <baijiaju@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>

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