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scsi: virtio-scsi: Correctly handle the case where all LUNs are unplugged
Commit 5ff8437214
("scsi: virtio_scsi: unplug LUNs when events missed")
missed a corner case in which all the LUNs are unplugged at the same time.
In this case INQUIRY returns DID_BAD_TARGET. Detect this and unplug the
LUN.
Link: https://lore.kernel.org/r/20200729194806.4933-2-mlevitsk@redhat.com
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -350,6 +350,14 @@ static void virtscsi_rescan_hotunplug(struct virtio_scsi *vscsi)
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if (result == 0 && inq_result[0] >> 5) {
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/* PQ indicates the LUN is not attached */
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scsi_remove_device(sdev);
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} else if (host_byte(result) == DID_BAD_TARGET) {
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/*
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* If all LUNs of a virtio-scsi device are unplugged
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* it will respond with BAD TARGET on any INQUIRY
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* command.
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* Remove the device in this case as well.
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*/
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scsi_remove_device(sdev);
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}
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}
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