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    SubjectRe: [RFC] DMA mapping error check analysis
    On Fri, 7 Sep 2012, Shuah Khan wrote:

    > I analyzed all calls to dma_map_single() and dma_map_page() in the
    > kernel, to see if callers check for mapping errors, before using the
    > returned address.
    > The goal of this analysis is to find drivers that currently do not
    > check dma mapping errors, and fix them.
    > I documented the results of this analysis:
    > Please review and give me feedback on the analysis and the proposed
    > next steps.

    Your first table (dma_map_single) lists drivers/usb/core/usb.c and
    marks it as Bad. This is a mistake because the code is #ifdef'ed out.
    It hasn't been used in many years; it should be removed.

    Alan Stern

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