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    i2c: Fix probing of FSC hardware monitoring chips · b1d4b390
    Jean Delvare 提交于
    Some FSC hardware monitoring chips (Syleus at least) doesn't like
    quick writes we typically use to probe for I2C chips. Use a regular
    byte read instead for the address they live at (0x73). These are the
    only known chips living at this address on PC systems.
    
    For clarity, this fix should not be needed for kernels 2.6.30 and
    later, as we started instantiating the hwmon devices explicitly based
    on DMI data. Still, this fix is valuable in the following two cases:
    * Support for recent FSC chips on older kernels. The DMI-based device
      instantiation is more difficult to backport than the device support
      itself.
    * Case where the DMI-based device instantiation fails, whatever the
      reason. We fall back to probing in that case, so it should work.
    
    This fixes kernel bug #15634:
    https://bugzilla.kernel.org/show_bug.cgi?id=15634Signed-off-by: NJean Delvare <khali@linux-fr.org>
    Acked-by: NHans de Goede <hdegoede@redhat.com>
    Cc: stable@kernel.org
    b1d4b390
i2c-core.c 52.6 KB