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Message-ID: <20070212150410.GA17400@elf.ucw.cz> Date: Mon, 12 Feb 2007 16:04:10 +0100 From: Pavel Machek <pavel@....cz> To: Geert Uytterhoeven <geert@...ux-m68k.org> Cc: "Rafael J. Wysocki" <rjw@...k.pl>, Arjan van de Ven <arjan@...radead.org>, nigel@...el.suspend2.net, LKML <linux-kernel@...r.kernel.org> Subject: Re: NAK new drivers without proper power management? Hi! > > "If the device requires that, implement .suspend and .resume or at least > ^^^^^^^^ > > define .suspend that will always return -ENOSYS (then people will know they > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > have to unload the driver before the suspend). Similarly, if you aren't sure > > whether or not the device requires .suspend and .resume, define .suspend that > ^^^^^^^^^^^^^^^^^^^^ > > will always return -ENOSYS." > ^^^^^^^^^^^^^^^^^^^^^^^^^^^ > Can't the upper layer just assume -ENOSYS if .resume/.suspend is NULL? > It's nicer if you don't have to implement dummy functions at all. Unfortunately, drivers currently assume "NULL == nothing is needed", so we'd have t do big search & replace... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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