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    SubjectRe: highmem, aic7xxx, and vfat: too few segs for dma mapping
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    On Thu, 2001-12-13 at 14:48, Justin T. Gibbs wrote:
    > >So according to this, zero.
    >
    > Thanks for the info - its the first useful report I've gotten todate. 8-)
    > I believe I've found and fixed the bug. I've changed a few other things
    > in the driver for the 6.2.5 release, so once I've tested them I'll release
    > new patches. In the mean time, you should be able to avoid the problem by
    > moving the initialization of scb->sg_count to 0 in the function:
    >
    > aic7xxx_linux.c:ahc_linux_run_device_queue()
    >
    > to before the statement:
    >
    > if (cmd->use_sg != 0) {
    >
    > I'd give you diffs, but these other changes in my tree need more testing
    > before I'll feel comfortable releasing them. I also don't have a 2.5 tree
    > downloaded yet to verify that the driver functions there.
    >
    > In order to reproduce the bug, you need to issue a command that uses
    > all of the segments of a given transaction and then have a command with
    > use_sg == 0 be the next command to use that same SCB. This explains why
    > I was not able to reproduce the problem here.

    Thanks, I will test it out here and let you know, looks like David
    Miller is proposing the same assignment in a different place.

    Steve

    >
    > --
    > Justin
    --

    Steve Lord voice: +1-651-683-3511
    Principal Engineer, Filesystem Software email: lord@sgi.com
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