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    SubjectRe: [RFC 1/1] Driver Core: don't oops with unregistered driver in driver_find_device()
    On Thu, May 10, 2012 at 10:35:02AM +0300, Hiroshi DOYU wrote:
    > driver_find_device() can be called with an unregistered driver.

    Who does that? Where in the kernel? Why would you try to do that?

    > Need to check driver_private to see if it's populated or not,
    > especially under deferrable probe.

    Hm, I don't know if this will really catch a driver that was registered
    and then was unregistered, right? It seems like moving the real problem
    somewhere else, why not fix the original issue instead?

    > Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
    > ---
    > In [PATCHv5 2/3] ARM: tegra: Add SMMU enabler in AHB:
    > http://article.gmane.org/gmane.linux.ports.tegra/4658
    >
    > "tegra_ahb_driver" may not be populated when it's called.

    It can? I don't see that in that patch.

    confused,

    greg k-h


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