From: David Miller <davem@davemloft.net>
To: galak@kernel.crashing.org
Cc: timur.tabi@gmail.com, afleming@freescale.com, netdev@vger.kernel.org
Subject: Re: [PATCH] gianfar: Wait for both RX and TX to stop
Date: Wed, 21 Apr 2010 14:33:30 -0700 (PDT) [thread overview]
Message-ID: <20100421.143330.80015172.davem@davemloft.net> (raw)
In-Reply-To: <CD8C73BA-0E18-4F85-A90B-C2FA5FFC8689@kernel.crashing.org>
From: Kumar Gala <galak@kernel.crashing.org>
Date: Wed, 21 Apr 2010 14:13:00 -0500
> I'm not opposed, I'm just asking if we are saying we shouldn't be using cpu_relax() for spinning on HW status registers ever.
>
> If we are suggesting that cpu_relax() shouldn't be used in these scenarios going forward I'm ok w/the change you suggest and starting to convert other cpu_relax() calls to use spin_event_timeout()
Kumar this isn't an either-or thing.
In both cases we're using cpu_relax().
But by using spin_event_timeout() you're getting both the cpu_relax()
and a break-out in case the hardware gets wedged for some reason.
next prev parent reply other threads:[~2010-04-21 21:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-18 23:13 [PATCH] gianfar: Wait for both RX and TX to stop Andy Fleming
2010-04-19 21:08 ` Timur Tabi
2010-04-20 4:43 ` Kumar Gala
2010-04-20 15:01 ` Timur Tabi
2010-04-20 15:59 ` Timur Tabi
2010-04-21 1:06 ` David Miller
2010-04-21 4:22 ` Kumar Gala
2010-04-21 5:36 ` David Miller
2010-04-21 12:17 ` Kumar Gala
2010-04-21 14:33 ` Timur Tabi
2010-04-21 19:13 ` Kumar Gala
2010-04-21 21:33 ` David Miller [this message]
2010-04-20 4:44 ` Kumar Gala
2010-04-20 8:18 ` David Miller
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