bcm53xx: add early support for kernel 4.14

Don't switch to it by default yet as it requires more testing.

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

1 files changed, 29 insertions, 0 deletions

diff --git a/target/linux/bcm53xx/patches-4.14/982-PCI-iproc-Disable-DMA-mapping-support.patch b/target/linux/bcm53xx/patches-4.14/982-PCI-iproc-Disable-DMA-mapping-support.patch
new file mode 100644
index 0000000000..8196afb015
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.14/982-PCI-iproc-Disable-DMA-mapping-support.patch
@@ -0,0 +1,29 @@
+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
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+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;