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| /freebsd-11-stable/sys/mips/atheros/ | ||
| H A D | if_arge.c | diff 290212 Fri Oct 30 21:17:20 MDT 2015 adrian arge_mdio: add explicit read barriers for MDIO_READs. The mips74k programmers guide notes that reads can be re-ordered, even uncached ones, so we need an explicit SYNC between them. Yes, this is a case of a driver author actively doing a bus barrier operation. This ends up being necessary when the mips74k core is run in write-back mode rather than write-through mode. That's coming in an upcoming commit. Tested: * mips74k, QCA9558 SoC (AP135 reference board), arge<->arge interface routing traffic tests. |
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