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libata: mask off DET when restoring SControl for detach
libata restores SControl on detach; however, trying to restore non-zero DET can cause undeterministic behavior including PMP device going offline till power cycling. Mask off DET when restoring SControl. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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@ -5936,7 +5936,7 @@ static void ata_port_detach(struct ata_port *ap)
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* to us. Restore SControl and disable all existing devices.
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*/
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__ata_port_for_each_link(link, ap) {
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sata_scr_write(link, SCR_CONTROL, link->saved_scontrol);
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sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0);
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ata_link_for_each_dev(dev, link)
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ata_dev_disable(dev);
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}
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