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Jian Peng authored
At the end of section 10.1 of AHCI spec (rev 1.3), it states Software shall not set PxCMD.ST to 1 until it is determined that a functoinal device is present on the port as determined by PxTFD.STS.BSY=0, PxTFD.STS.DRQ=0 and PxSSTS.DET=3h Even though most AHCI host controller works without this check, specific controller will fail under this condition. Signed-off-by:
Jian Peng <jipeng2005@gmail.com> Signed-off-by:
Jeff Garzik <jgarzik@pobox.com>
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