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kernel: fix parsing fixed subpartitions

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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit ed4641e9f1)
This commit is contained in:
Rafał Miłecki 2021-05-06 13:10:17 +02:00
parent 567ad2d434
commit 4b89b90d9f
4 changed files with 84 additions and 8 deletions
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76
target/linux/generic/pending-5.4/410-mtd-parsers-ofpart-fix-parsing-subpartitions.patch Normal file
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@ -0,0 +1,76 @@
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Thu, 6 May 2021 12:33:58 +0200
Subject: [PATCH] mtd: parsers: ofpart: fix parsing subpartitions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
ofpart was recently patched to not scan random partition nodes as
subpartitions. That change unfortunately broke scanning valid
subpartitions like:
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
compatible = "fixed-partitions";
label = "bootloader";
reg = <0x0 0x100000>;
partition@0 {
label = "config";
reg = <0x80000 0x80000>;
};
};
};
Fix that regression by adding 1 more code path. We actually need 3
conditional blocks to support 3 possible cases. This change also makes
code easier to understand & follow.
Reported-by: David Bauer <mail@david-bauer.net>
Fixes: 2d751203aacf ("mtd: parsers: ofpart: limit parsing of deprecated DT syntax
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
drivers/mtd/parsers/ofpart_core.c | 26 ++++++++++++++------------
1 file changed, 14 insertions(+), 12 deletions(-)
--- a/drivers/mtd/parsers/ofpart_core.c
+++ b/drivers/mtd/parsers/ofpart_core.c
@@ -57,20 +57,22 @@ static int parse_fixed_partitions(struct
if (!mtd_node)
return 0;
- ofpart_node = of_get_child_by_name(mtd_node, "partitions");
- 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
- * KERN_DEBUG
- */
- pr_debug("%s: 'partitions' subnode not found on %pOF. Trying to parse direct subnodes as partitions.\n",
- master->name, mtd_node);
+ if (!mtd_is_partition(master)) { /* Master */
+ ofpart_node = of_get_child_by_name(mtd_node, "partitions");
+ if (!ofpart_node) {
+ /*
+ * We might get here even when ofpart isn't used at all (e.g.,
+ * when using another parser), so don't be louder than
+ * KERN_DEBUG
+ */
+ pr_debug("%s: 'partitions' subnode not found on %pOF. Trying to parse direct subnodes as partitions.\n",
+ master->name, mtd_node);
+ ofpart_node = mtd_node;
+ dedicated = false;
+ }
+ } else { /* Partition */
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) {

4
target/linux/kirkwood/patches-5.4/202-linksys-find-active-root.patch
View File

@ -22,7 +22,7 @@ Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
const char *partname;
struct device_node *pp;
int nr_parts, i, ret = 0;
@@ -131,9 +134,15 @@ static int parse_fixed_partitions(struct
@@ -133,9 +136,15 @@ static int parse_fixed_partitions(struct
parts[i].size = of_read_number(reg + a_cells, s_cells);
parts[i].of_node = pp;
@ -41,7 +41,7 @@ Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
parts[i].name = partname;
if (of_get_property(pp, "read-only", &len))
@@ -247,6 +256,18 @@ static int __init ofpart_parser_init(voi
@@ -249,6 +258,18 @@ static int __init ofpart_parser_init(voi
return 0;
}

8
target/linux/lantiq/patches-5.4/0101-find_active_root.patch
View File

@ -48,7 +48,7 @@
/* Pull of_node from the master device node */
mtd_node = mtd_get_of_node(master);
@@ -93,7 +127,9 @@ static int parse_fixed_partitions(struct
@@ -95,7 +129,9 @@ static int parse_fixed_partitions(struct
return 0;
parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
@ -59,7 +59,7 @@
return -ENOMEM;
i = 0;
@@ -142,6 +178,11 @@ static int parse_fixed_partitions(struct
@@ -144,6 +180,11 @@ static int parse_fixed_partitions(struct
if (of_get_property(pp, "lock", &len))
parts[i].mask_flags |= MTD_POWERUP_LOCK;
@ -71,7 +71,7 @@
i++;
}
@@ -151,6 +192,11 @@ static int parse_fixed_partitions(struct
@@ -153,6 +194,11 @@ static int parse_fixed_partitions(struct
if (quirks && quirks->post_parse)
quirks->post_parse(master, parts, nr_parts);
@ -83,7 +83,7 @@
*pparts = parts;
return nr_parts;
@@ -161,6 +207,7 @@ ofpart_fail:
@@ -163,6 +209,7 @@ ofpart_fail:
ofpart_none:
of_node_put(pp);
kfree(parts);

4
target/linux/mvebu/patches-5.4/400-find_active_root.patch
View File

@ -22,7 +22,7 @@ Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
struct device_node *pp;
int nr_parts, i, ret = 0;
bool dedicated = true;
@@ -131,9 +134,13 @@ static int parse_fixed_partitions(struct
@@ -133,9 +136,13 @@ static int parse_fixed_partitions(struct
parts[i].size = of_read_number(reg + a_cells, s_cells);
parts[i].of_node = pp;
@ -39,7 +39,7 @@ Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
parts[i].name = partname;
if (of_get_property(pp, "read-only", &len))
@@ -247,6 +254,18 @@ static int __init ofpart_parser_init(voi
@@ -249,6 +256,18 @@ static int __init ofpart_parser_init(voi
return 0;
}