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Message-ID: <20071209134158.GA21475@gallifrey> Date: Sun, 9 Dec 2007 13:41:58 +0000 From: "Dr. David Alan Gilbert" <linux@...blig.org> To: Pavel Machek <pavel@....cz> Cc: Alan Cox <alan@...rguk.ukuu.org.uk>, Andi Kleen <andi@...stfloor.org>, "David P. Reed" <dpreed@...d.com>, linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com> Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops * Pavel Machek (pavel@....cz) wrote: > Hi! > Actually, I've seen few pci cards with leds on port 0x80, and I > wonder: is our outb_p really correct? > > I mean, we expect 8usec delay -- historical ISA timing -- but when > _PCI_ card with leds is inserted, it is likely to be faster than old > ISA, right? In the opposite direction I'm sure I've heard of things that port 80 information down i2c - could this be slower? Dave -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux on Alpha,68K| Happy \ \ gro.gilbert @ treblig.org | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex / \ _________________________|_____ http://www.treblig.org |_______/ -- 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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