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    SubjectRe: [RFC/PATCH 0/5] read/write on attribute w/o show/store should return -ENOSYS
    On Thu, Apr 28, 2005 at 12:30:09AM -0500, Dmitry Torokhov wrote:
    > Hi,
    >
    > Jean Delvare has noticed that if a driver happens to declare its
    > attribute as RW but doesn't provide store() method attempt to write
    > into such attribute will cause spinning process as most of the
    > attribute implementations return 0 in case of missing store causing
    > endless retries. In some cases missing show/store will return -EPERM,
    > -EACCESS or -EINVAL.
    >
    > I think we should unify implementations and have them all return -ENOSYS
    > (function not implemented) when corresponding method (show/store) is
    > missing.

    What is the POSIX standard for this? ENOSYS or EACCESS?

    Or anyone have a link that I can look this up at?

    thanks,

    greg k-h

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