Use cached progif instead of reading it again.
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@ -84,7 +84,7 @@ ata_ahci_probe(device_t dev)
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return (ENXIO);
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/* is this PCI device flagged as an AHCI compliant chip ? */
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if (pci_read_config(dev, PCIR_PROGIF, 1) != PCIP_STORAGE_SATA_AHCI_1_0)
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if (pci_get_progif(dev) != PCIP_STORAGE_SATA_AHCI_1_0)
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return (ENXIO);
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if (bootverbose)
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