Re: [PATCH] 3c59x: read current link status from phy
From: Bogdan Costescu <hidden>
Date: 2005-09-08 11:58:22
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On Wed, 7 Sep 2005, Jeff Garzik wrote:
quoted
The phy status register must be read twice in order to get the actual link state.
Can the original poster give an explanation ? I've enjoyed a rather well functioning 3c59x driver for the past ~6 years without such double reading. Plus: - this operation is I/O expensive - it is performed inside a region protected by a spinlock - it is performed often, every 60 seconds Is there some specific hardware that exhibits a problem that is solved by this double reading ? -- Bogdan Costescu IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868 E-mail: Bogdan.Costescu@IWR.Uni-Heidelberg.De