net: sfp: ignore power level 3 prior to SFF-8472 Rev 11.4

Power level 3 was included in SFF-8472 revision 11.9, but this does
not have a compliance code. Use revision 11.4 as the minimum
compliance level instead.

This should avoid any spurious indication of 2W modules.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/phy/sfp.c

@@ -1764,7 +1764,9 @@ static int sfp_module_parse_power(struct sfp *sfp)
 	if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 &&
 	    sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL))
 		power_mW = 1500;
-	if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL))
+	/* Added in Rev 11.9, but there is no compliance code for this */
+	if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV11_4 &&
+	    sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL))
 		power_mW = 2000;
 
 	/* Power level 1 modules (max. 1W) are always supported. */