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77 lines
2.3 KiB
Diff
77 lines
2.3 KiB
Diff
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Thu, 6 May 2021 12:33:58 +0200
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Subject: [PATCH] mtd: parsers: ofpart: fix parsing subpartitions
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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ofpart was recently patched to not scan random partition nodes as
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subpartitions. That change unfortunately broke scanning valid
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subpartitions like:
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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partition@0 {
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compatible = "fixed-partitions";
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label = "bootloader";
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reg = <0x0 0x100000>;
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partition@0 {
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label = "config";
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reg = <0x80000 0x80000>;
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};
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};
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};
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Fix that regression by adding 1 more code path. We actually need 3
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conditional blocks to support 3 possible cases. This change also makes
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code easier to understand & follow.
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Reported-by: David Bauer <mail@david-bauer.net>
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Fixes: 2d751203aacf ("mtd: parsers: ofpart: limit parsing of deprecated DT syntax
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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---
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drivers/mtd/parsers/ofpart_core.c | 26 ++++++++++++++------------
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1 file changed, 14 insertions(+), 12 deletions(-)
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--- a/drivers/mtd/parsers/ofpart_core.c
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+++ b/drivers/mtd/parsers/ofpart_core.c
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@@ -57,20 +57,22 @@ static int parse_fixed_partitions(struct
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if (!mtd_node)
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return 0;
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- ofpart_node = of_get_child_by_name(mtd_node, "partitions");
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- if (!ofpart_node && !master->parent) {
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- /*
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- * We might get here even when ofpart isn't used at all (e.g.,
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- * when using another parser), so don't be louder than
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- * KERN_DEBUG
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- */
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- pr_debug("%s: 'partitions' subnode not found on %pOF. Trying to parse direct subnodes as partitions.\n",
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- master->name, mtd_node);
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+ if (!master->parent) { /* Master */
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+ ofpart_node = of_get_child_by_name(mtd_node, "partitions");
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+ if (!ofpart_node) {
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+ /*
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+ * We might get here even when ofpart isn't used at all (e.g.,
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+ * when using another parser), so don't be louder than
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+ * KERN_DEBUG
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+ */
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+ pr_debug("%s: 'partitions' subnode not found on %pOF. Trying to parse direct subnodes as partitions.\n",
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+ master->name, mtd_node);
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+ ofpart_node = mtd_node;
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+ dedicated = false;
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+ }
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+ } else { /* Partition */
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ofpart_node = mtd_node;
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- dedicated = false;
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}
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- if (!ofpart_node)
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- return 0;
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of_id = of_match_node(parse_ofpart_match_table, ofpart_node);
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if (dedicated && !of_id) {
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