
The iommu domain we grab from iommu_get_domain_for_dev can be NULL. Eventually we will hit a NULL dereference in the cam_smmu_alloc_firmware due to the missing check. Modify the existing check to account for the possiblity of a NULL domain and bail early. CRs-Fixed: 2804766 Change-Id: I201260c3559b847cfb0bf7f85226816af148671d Signed-off-by: Fernando Pacheco <fpacheco@codeaurora.org>