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    SubjectRe: [PATCH 1/2] I/OAT: Add watchdog/reset functionality to ioatdma driver
    On Mon, Jul 14, 2008 at 7:17 AM, Brice Goglin <> wrote:
    > Maciej Sosnowski wrote:
    >> Due to occasional DMA channel hangs observed for I/OAT versions 1.2 and 2.0
    >> a watchdog has been introduced to check every 2 seconds
    >> if all channels progress normally.
    >> If stuck channel is detected, driver resets it.
    >> The reset is done in two parts. The second part is scheduled
    >> by the first one to reinitialize the channel after the restart.
    > Is all this transparent to the caller? Are you reposting all copies to
    > the hardware after the reset? Or are we going to get some DMA_ERROR
    > return values ?
    >> Sleep time in self_test has been increased to 10ms
    >> since in some cases 1ms appeared not to be enough
    > Thanks Maciej, this helps a lot here.

    Can I interpret this as a "Tested-by" for the watchdog and/or the self_test fix?

    > Brice


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