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-rw-r--r--drivers/firewire/fw-sbp2.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index ea4811c45512..60ebcb5fe21a 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -1473,6 +1473,10 @@ static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
{
struct sbp2_logical_unit *lu = sdev->hostdata;
+ /* (Re-)Adding logical units via the SCSI stack is not supported. */
+ if (!lu)
+ return -ENOSYS;
+
sdev->allow_restart = 1;
/*