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Message-ID: <20150401081133.GA4384@enneenne.com> Date: Wed, 1 Apr 2015 10:11:41 +0200 From: Rodolfo Giometti <giometti@...eenne.com> To: Christian Riesch <christian.riesch@...cron.at> Cc: linux-kernel@...r.kernel.org Subject: Re: [PATCH] pps: Add support for read operations and return a useful value in poll On Tue, Mar 31, 2015 at 11:31:22PM +0200, Christian Riesch wrote: > The PPS_FETCH ioctl in drivers/pps/pps.c blocks until a new PPS event > occurs, then returns the time stamp data. While this is fine for > lots of applications, sometimes it would be nice if the poll system > call and a subsequent read could be used to obtain the pps data. Nak. The read syscall can't be forced to return fix amount of data. Use a dedicated ioctl instead. Ciao, Rodolfo -- HCE Engineering e-mail: giometti@...-engineering.com GNU/Linux Solutions giometti@...eenne.com Linux Device Driver giometti@...ux.it Embedded Systems phone: +39 349 2432127 UNIX programming skype: rodolfo.giometti Cosino Project - the quick prototyping embedded system - www.cosino.io Freelance ICT Italia - Consulente ICT Italia - www.consulenti-ict.it -- 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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