From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Fri, 29 Dec 2017 22:39:45 +0100
Subject: [PATCH] PCI: iproc: Disable DMA mapping support
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This has been added in commit dd9d4e7498de3 ("PCI: iproc: Add inbound
DMA mapping support") which causes a crash for bcma case. Function
pci_dma_range_parser_init calls of_n_addr_cells with a NULL argument
which causes a NULL pointer dereference.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---

--- a/drivers/pci/host/pcie-iproc.c
+++ b/drivers/pci/host/pcie-iproc.c
@@ -1396,9 +1396,11 @@ int iproc_pcie_setup(struct iproc_pcie *
 		}
 	}
 
+if (0) {
 	ret = iproc_pcie_map_dma_ranges(pcie);
 	if (ret && ret != -ENOENT)
 		goto err_power_off_phy;
+}
 
 #ifdef CONFIG_ARM
 	pcie->sysdata.private_data = pcie;