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of: address: Fix parser address/size cells initialization 

bus->count_cells() parses cells starting from the node's parent. This is
not good enough for parser_init() which is generally parsing a bus node.

Revert to previous behavior using of_bus_n_*_cells().

Fixes: 2f96593ecc ("of_address: Add bus type match for pci ranges parser")
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Nicolas Saenz Julienne 2020-07-31 12:02:48 +02:00 committed by Thomas Bogendoerfer
parent 0fc0ead348
commit c3028b951e
1 changed files with 2 additions and 2 deletions
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4
drivers/of/address.c
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@ -701,11 +701,11 @@ static int parser_init(struct of_pci_range_parser *parser,
parser->node = node;
parser->pna = of_n_addr_cells(node);
parser->na = of_bus_n_addr_cells(node);
parser->ns = of_bus_n_size_cells(node);
parser->dma = !strcmp(name, "dma-ranges");
parser->bus = of_match_bus(node);
parser->bus->count_cells(parser->node, &parser->na, &parser->ns);
parser->range = of_get_property(node, name, &rlen);
if (parser->range == NULL)
return -ENOENT;