Winbond-NMBM-fix.patch

From 0560802d2f5c2bb4346551950e806f77944cf419 Mon Sep 17 00:00:00 2001
From: Mikhail Zhilkin <csharper2005@gmail.com>
Date: Sun, 17 Nov 2024 16:30:31 +0000
Subject: [PATCH] kernel: quick fix for nmbm with Winbond W25N01KV

Fixes: https://github.com/openwrt/openwrt/issues/16972

Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>
---
 target/linux/generic/files/drivers/mtd/nand/mtk_bmt_nmbm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt_nmbm.c b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt_nmbm.c
index a896e49ec04751..6ec9b388076dea 100644
--- a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt_nmbm.c
+++ b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt_nmbm.c
@@ -2197,10 +2197,15 @@ static int nmbm_attach(struct nmbm_instance *ni)
 		return -EINVAL;
 	}
 
+	nlog_info(ni, "ni->signature.spare_size: %u [0x%02x]\n",
+		ni->signature.spare_size, ni->signature.spare_size);
+	nlog_info(ni, "bmtd.mtd->oobsize: %u [0x%02x]\n",
+		bmtd.mtd->oobsize, bmtd.mtd->oobsize);
+
 	if (ni->signature.nand_size != bmtd.total_blks << bmtd.blk_shift ||
 	    ni->signature.block_size != bmtd.blk_size ||
 	    ni->signature.page_size != bmtd.pg_size ||
-	    ni->signature.spare_size != bmtd.mtd->oobsize) {
+	    ni->signature.spare_size > bmtd.mtd->oobsize) {
 		nlog_err(ni, "NMBM configuration mismatch\n");
 		return -EINVAL;
 	}