[RFC/PATCH 0/5] read/write on attribute w/o show/store should return -ENOSYS

From: Dmitry Torokhov
Date: Thu Apr 28 2005 - 00:47:36 EST


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,

I think we should unify implementations and have them all return -ENOSYS
(function not implemented) when corresponding method (show/store) is

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