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    SubjectRe: [PATCH] net: phy: Add sysfs attribute to prevent PHY suspend
    On 03/10/2014 01:41 AM, David Miller wrote:
    > From: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
    > Date: Mon, 10 Mar 2014 01:37:32 +0100
    >
    >> The mechanism is manual, no automatic way to determine it.
    >
    > We recognize BIOS and ACPI bugs and work around them, by looking at
    > version information and whatnot, so you really can't convince me that
    > something similar can't be done here perhaps in the platform code.

    Hmm, if the is a way to determine the version of that particual u-boot
    I'd be happy to exploit that information. But I honestly doubt that.
    Compared to u-boot bootloader and kernel interaction, BIOS and ACPI
    are well-defined protocols.

    I personally, would prefer everybody should update his broken
    bootloaders, but that will just not happen.

    Anyway, at least for the two boards in question, we know a bootloader
    workaround. The version does support user commands to re-enable the PHY
    by writing the corresponding registers.

    Unfortunately, the is a bug in phy_ethtool_get_wol that up to now,
    prevents most PHYs (without .wol callbacks) from being suspended.
    I wanted to get in a way to disable suspend before sending a fix.

    If you are that against a sysfs knob, I guess, we will just see how
    many more bootloaders are broken and some will not have a way to write
    PHY registers.

    Sebastian


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