From 36ac73c58902fa79e84f53eaa3a85c1233049dd5 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Thu, 5 Sep 2019 10:47:26 +0100 Subject: [PATCH] UPSTREAM: of/address: Fix of_pci_range_parser_one translation of DMA addresses of_pci_range_parser_one() has a bug when parsing dma-ranges. When it translates the parent address (aka cpu address in the code), 'ranges' is always being used. This happens to work because most users are just 1:1 translation. Cc: Robin Murphy Tested-by: Nicolas Saenz Julienne Reviewed-by: Nicolas Saenz Julienne Signed-off-by: Rob Herring (cherry picked from commit 645c138636de3d6d6ed7d92edec39298fd6873d7) Signed-off-by: John Stultz Change-Id: I7dacf6a346c3e79c7a68c5826b9193b19f4dd03a --- drivers/of/address.c | 15 ++++++++++++--- include/linux/of_address.h | 1 + 2 files changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/of/address.c b/drivers/of/address.c index 6a61ebfd4017..148ee5c4851f 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -243,6 +243,7 @@ static int parser_init(struct of_pci_range_parser *parser, parser->node = node; parser->pna = of_n_addr_cells(node); parser->np = parser->pna + na + ns; + parser->dma = !strcmp(name, "dma-ranges"); parser->range = of_get_property(node, name, &rlen); if (parser->range == NULL) @@ -281,7 +282,11 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser, range->pci_space = be32_to_cpup(parser->range); range->flags = of_bus_pci_get_flags(parser->range); range->pci_addr = of_read_number(parser->range + 1, ns); - range->cpu_addr = of_translate_address(parser->node, + if (parser->dma) + range->cpu_addr = of_translate_dma_address(parser->node, + parser->range + na); + else + range->cpu_addr = of_translate_address(parser->node, parser->range + na); range->size = of_read_number(parser->range + parser->pna + na, ns); @@ -294,8 +299,12 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser, flags = of_bus_pci_get_flags(parser->range); pci_addr = of_read_number(parser->range + 1, ns); - cpu_addr = of_translate_address(parser->node, - parser->range + na); + if (parser->dma) + cpu_addr = of_translate_dma_address(parser->node, + parser->range + na); + else + cpu_addr = of_translate_address(parser->node, + parser->range + na); size = of_read_number(parser->range + parser->pna + na, ns); if (flags != range->flags) diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 311a6a474cda..3ecc3fb716d8 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -12,6 +12,7 @@ struct of_pci_range_parser { const __be32 *end; int np; int pna; + bool dma; }; struct of_pci_range {