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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Tue, 13 Apr 2021 18:25:20 +0200
Subject: [PATCH] mtd: parsers: trx: parse "firmware" MTD partitions only
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Parsing every partition with "compatible" set to "brcm,trx" results in
parsing both: firmware partition and failsafe partition on devices that
implement failsafe booting. This affects e.g. Linksys EA9500 which has:
partition@200000 {
reg = <0x0200000 0x01d00000>;
compatible = "linksys,ns-firmware", "brcm,trx";
};
partition@1f00000 {
reg = <0x01f00000 0x01d00000>;
compatible = "linksys,ns-firmware", "brcm,trx";
};
Check for MTD partition name "firmware" before parsing. Recently added
ofpart_linksys_ns.c creates "firmware" and "failsafe" depending on
bootloader setup.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
drivers/mtd/parsers/parser_trx.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/mtd/parsers/parser_trx.c
+++ b/drivers/mtd/parsers/parser_trx.c
@@ -92,6 +92,10 @@ static int parser_trx_parse(struct mtd_i
if (err != 0 && err != -EINVAL)
pr_err("failed to parse \"brcm,trx-magic\" DT attribute, using default: %d\n", err);
+ /* Don't parse any failsafe / backup partitions */
+ if (strcmp(mtd->name, "firmware"))
+ return -EINVAL;
+
parts = kcalloc(TRX_PARSER_MAX_PARTS, sizeof(struct mtd_partition),
GFP_KERNEL);
if (!parts)
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