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Date: Wed, 08 Aug 2007 09:52:55 -0500 From: Paul Fulghum <paulkf@...rogate.com> To: Laurent Pinchart <laurentp@...-semaphore.com> Cc: Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org Subject: Re: Serial buffer memory leak On Wed, 2007-08-08 at 16:28 +0200, Laurent Pinchart wrote: > The patch fixes the problem (at least under the test conditions that lead me > to discover it in the first place). Thanks Alan. It works here also, but I see a problem. By deferring the flush, ioctl(TCFLSH) returns immediately even though there is possibly still receive data being fed to the ldisc. If this is followed immediately by a read() then the application gets unexpected (stale) data defeating the purpose of the TCFLSH. tty_buffer_flush() needs to wait for buf.flushpending to clear. -- Paul Fulghum Microgate Systems, Ltd - 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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