pcie->dev->of_node not always defined (NULL) and can cause crash: [ 19.053195] Unable to handle kernel NULL pointer dereference at virtual address 00000020 [<c0b0370c>] (of_n_addr_cells) from [<c06599c4>] (iproc_pcie_setup+0x30c/0xce0) this patch adds sanity check to prevent crash. Signed-off-by: Abylay Ospan <aospan@xxxxxxxx> --- drivers/pci/host/pcie-iproc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c index 3ebc025..f2836a9 100644 --- a/drivers/pci/host/pcie-iproc.c +++ b/drivers/pci/host/pcie-iproc.c @@ -952,6 +952,9 @@ static int pci_dma_range_parser_init(struct of_pci_range_parser *parser, const int na = 3, ns = 2; int rlen; + if (!node) + return -ENOENT; + parser->node = node; parser->pna = of_n_addr_cells(node); parser->np = parser->pna + na + ns; -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
