linux-kernel - [PATCH 05/28] mtd: spinand: Add missing check

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Message-Id: <20251031-winbond-v6-17-rc1-oddr-v1-5-be42de23ebf1@bootlin.com>
Date: Fri, 31 Oct 2025 18:26:49 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Mark Brown <broonie@...nel.org>, Richard Weinberger <richard@....at>, 
 Vignesh Raghavendra <vigneshr@...com>
Cc: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Pratyush Yadav <pratyush@...nel.org>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Steam Lin <STLin2@...bond.com>, Santhosh Kumar K <s-k6@...com>, 
 linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-mtd@...ts.infradead.org, Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 05/28] mtd: spinand: Add missing check

The update cache variant is mandatory, both read and write versions are
being checked, but not this one. All chip drivers seem to implement this
variant, so there should be no breakage.

Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---
The core has been like that since the begining, I do not think this
patch should be backported, hence no Fixes tag. This barely
qualifies as a fix anyway.
---
 drivers/mtd/nand/spi/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index e748fa47ef7bffb7f443b37261d138b35eb4cc7a..9d4e82554dab07b676632155ae94a706cf1177df 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1431,6 +1431,9 @@ int spinand_match_and_init(struct spinand_device *spinand,
 
 		op = spinand_select_op_variant(spinand,
 					       info->op_variants.update_cache);
+		if (!op)
+			return -ENOTSUPP;
+
 		spinand->op_templates.update_cache = op;
 
 		return 0;

-- 
2.51.0