The Linux SCSI Generic (sg) HOWTO
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# 8.24. SCSI_IOCTL_GET_PCI

SCSI_IOCTL_GET_PCI 0x5387. Yields the PCI slot name (pci_dev::slot_name) associated with the lower level (adapter) driver that controls the current device. Up to 8 characters are output to the location pointed to by 'arg'. If the current device is not controlled by a PCI device then errno is set to ENXIO. [This ioctl() was introduced in lk 2.4.4]

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