mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 07:22:33 +00:00
81 lines
2.8 KiB
Diff
81 lines
2.8 KiB
Diff
From 3b65ca50d24ce33cb92d88840e289135c92b40ed Mon Sep 17 00:00:00 2001
|
|
From: Ray Jui <ray.jui@broadcom.com>
|
|
Date: Thu, 11 Jan 2018 12:36:16 -0800
|
|
Subject: [PATCH] PCI: iproc: Fix NULL pointer dereference for BCMA
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
With the inbound DMA mapping supported added, the iProc PCIe driver
|
|
parses DT property "dma-ranges" through call to
|
|
"of_pci_dma_range_parser_init()". In the case of BCMA, this results in a
|
|
NULL pointer deference due to a missing of_node.
|
|
|
|
Fix this by adding a guard in pcie-iproc-platform.c to only enable the
|
|
inbound DMA mapping logic when DT property "dma-ranges" is present.
|
|
|
|
Fixes: dd9d4e7498de3 ("PCI: iproc: Add inbound DMA mapping support")
|
|
Reported-by: Rafał Miłecki <rafal@milecki.pl>
|
|
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
|
|
[lorenzo.pieralisi@arm.com: updated commit log]
|
|
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
|
|
Tested-by: Rafał Miłecki <rafal@milecki.pl>
|
|
cc: <stable@vger.kernel.org> # 4.10+
|
|
---
|
|
drivers/pci/host/pcie-iproc-platform.c | 7 +++++++
|
|
drivers/pci/host/pcie-iproc.c | 8 +++++---
|
|
drivers/pci/host/pcie-iproc.h | 2 ++
|
|
3 files changed, 14 insertions(+), 3 deletions(-)
|
|
|
|
--- a/drivers/pci/host/pcie-iproc-platform.c
|
|
+++ b/drivers/pci/host/pcie-iproc-platform.c
|
|
@@ -92,6 +92,13 @@ static int iproc_pcie_pltfm_probe(struct
|
|
pcie->need_ob_cfg = true;
|
|
}
|
|
|
|
+ /*
|
|
+ * DT nodes are not used by all platforms that use the iProc PCIe
|
|
+ * core driver. For platforms that require explict inbound mapping
|
|
+ * configuration, "dma-ranges" would have been present in DT
|
|
+ */
|
|
+ pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
|
|
+
|
|
/* PHY use is optional */
|
|
pcie->phy = devm_phy_get(dev, "pcie-phy");
|
|
if (IS_ERR(pcie->phy)) {
|
|
--- 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 *
|
|
}
|
|
}
|
|
|
|
- ret = iproc_pcie_map_dma_ranges(pcie);
|
|
- if (ret && ret != -ENOENT)
|
|
- goto err_power_off_phy;
|
|
+ if (pcie->need_ib_cfg) {
|
|
+ ret = iproc_pcie_map_dma_ranges(pcie);
|
|
+ if (ret && ret != -ENOENT)
|
|
+ goto err_power_off_phy;
|
|
+ }
|
|
|
|
#ifdef CONFIG_ARM
|
|
pcie->sysdata.private_data = pcie;
|
|
--- a/drivers/pci/host/pcie-iproc.h
|
|
+++ b/drivers/pci/host/pcie-iproc.h
|
|
@@ -74,6 +74,7 @@ struct iproc_msi;
|
|
* @ob: outbound mapping related parameters
|
|
* @ob_map: outbound mapping related parameters specific to the controller
|
|
*
|
|
+ * @need_ib_cfg: indicates SW needs to configure the inbound mapping window
|
|
* @ib: inbound mapping related parameters
|
|
* @ib_map: outbound mapping region related parameters
|
|
*
|
|
@@ -101,6 +102,7 @@ struct iproc_pcie {
|
|
struct iproc_pcie_ob ob;
|
|
const struct iproc_pcie_ob_map *ob_map;
|
|
|
|
+ bool need_ib_cfg;
|
|
struct iproc_pcie_ib ib;
|
|
const struct iproc_pcie_ib_map *ib_map;
|
|
|