From 2d751203aacf86a1b301a188d8551c7da91043ab Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Tue, 2 Mar 2021 20:00:12 +0100 Subject: [PATCH] mtd: parsers: ofpart: limit parsing of deprecated DT syntax MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit For backward compatibility ofpart still supports the old syntax like: spi-flash@0 { compatible = "jedec,spi-nor"; reg = <0x0>; partition@0 { label = "bootloader"; reg = <0x0 0x100000>; }; }; (without "partitions" subnode). There is no reason however to support nested partitions without a clear "compatible" string like: partitions { compatible = "fixed-partitions"; #address-cells = <1>; #size-cells = <1>; partition@0 { label = "bootloader"; reg = <0x0 0x100000>; partition@0 { label = "config"; reg = <0x80000 0x80000>; }; }; }; (we never officially supported or documented that). Make sure ofpart doesn't attempt to parse above. Cc: Ansuel Smith Signed-off-by: Rafał Miłecki Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20210302190012.1255-1-zajec5@gmail.com --- drivers/mtd/parsers/ofpart_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/mtd/parsers/ofpart_core.c +++ b/drivers/mtd/parsers/ofpart_core.c @@ -53,7 +53,7 @@ static int parse_fixed_partitions(struct return 0; ofpart_node = of_get_child_by_name(mtd_node, "partitions"); - if (!ofpart_node) { + if (!ofpart_node && !mtd_is_partition(master)) { /* * We might get here even when ofpart isn't used at all (e.g., * when using another parser), so don't be louder than @@ -64,6 +64,8 @@ static int parse_fixed_partitions(struct ofpart_node = mtd_node; dedicated = false; } + if (!ofpart_node) + return 0; of_id = of_match_node(parse_ofpart_match_table, ofpart_node); if (dedicated && !of_id) {