diff options
| author | Ray Jui <ray.jui@broadcom.com> | 2018-01-11 12:36:16 -0800 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2018-01-12 10:40:18 +0000 |
| commit | 3b65ca50d24ce33cb92d88840e289135c92b40ed (patch) | |
| tree | b2b17d3f2c817ebcf7ac146026b27b69b61f6370 /drivers/pci/host/pcie-iproc.c | |
| parent | 09b2d20349e37a03a0951ab69524b516c8f1cc5b (diff) | |
| download | linux-3b65ca50d24ce33cb92d88840e289135c92b40ed.tar.bz2 | |
PCI: iproc: Fix NULL pointer dereference for BCMA
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+
Diffstat (limited to 'drivers/pci/host/pcie-iproc.c')
| -rw-r--r-- | drivers/pci/host/pcie-iproc.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c index 935909bbe5c4..75836067f538 100644 --- a/drivers/pci/host/pcie-iproc.c +++ b/drivers/pci/host/pcie-iproc.c @@ -1378,9 +1378,11 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) } } - 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; |