* [BUG] net: rocker: accessing the data mapped to streaming DMA
@ 2020-08-02 14:26 Jia-Ju Bai
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From: Jia-Ju Bai @ 2020-08-02 14:26 UTC (permalink / raw)
To: jiri, davem, kuba; +Cc: netdev, linux-kernel
In rocker_dma_test_offset(), "buf" is mapped to streaming DMA on line 203:
dma_handle = pci_map_single(..., buf, ...);
Then, "buf" is accessed on line 229:
expect[i] = ~buf[i];
This access may cause data inconsistency between CPU cache and hardware.
I am not sure how to properly fix this problem, and thus I only report it.
Best wishes,
Jia-Ju Bai
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2020-08-02 14:26 [BUG] net: rocker: accessing the data mapped to streaming DMA Jia-Ju Bai
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