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From: Arnd Bergmann <arnd@kernel.org>
To: Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Rosen Penev <rosenp@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Chris Down <chris@chrisdown.name>,
	Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>,
	Binbin Zhou <zhoubinbin@loongson.cn>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mtd: rawnand: ndfc: add CONFIG_OF dependency
Date: Thu, 18 Jun 2026 22:58:27 +0200	[thread overview]
Message-ID: <20260618205835.1497952-1-arnd@kernel.org> (raw)

From: Arnd Bergmann <arnd@arndb.de>

When compile-testing on x86 without CONFIG_OF, the ndfc driver produces
a harmless warning:

drivers/mtd/nand/raw/ndfc.c: In function 'ndfc_probe':
include/linux/dev_printk.h:154:31: error: 'len' is used uninitialized [-Werror=uninitialized]
  154 |         dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__)
      |                               ^
drivers/mtd/nand/raw/ndfc.c:196:17: note: in expansion of macro 'dev_err'
  196 |                 dev_err(&ofdev->dev, "unable read reg property (%d)\n", len);

Limit compile-testing to configurations with CONFIG_OF to trivially
avoid this. The driver will still be built in allmodconfig and many
randconfig builds.

Fixes: 4f2692a5383e ("mtd: rawnand: ndfc: use ioread32be/iowrite32be and allow COMPILE_TEST")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
We may also want to change the of_get_property() stub function to
initialize *len.
---
 drivers/mtd/nand/raw/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 64b8b99a3a68..1f4053e531fd 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -72,6 +72,7 @@ config MTD_NAND_AU1550
 config MTD_NAND_NDFC
 	tristate "IBM/MCC 4xx NAND controller"
 	depends on 44x || COMPILE_TEST
+	depends on OF
 	select MTD_NAND_ECC_SW_HAMMING
 	select MTD_NAND_ECC_SW_HAMMING_SMC
 	help
-- 
2.39.5


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@kernel.org>
To: Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Rosen Penev <rosenp@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Chris Down <chris@chrisdown.name>,
	Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>,
	Binbin Zhou <zhoubinbin@loongson.cn>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mtd: rawnand: ndfc: add CONFIG_OF dependency
Date: Thu, 18 Jun 2026 22:58:27 +0200	[thread overview]
Message-ID: <20260618205835.1497952-1-arnd@kernel.org> (raw)

From: Arnd Bergmann <arnd@arndb.de>

When compile-testing on x86 without CONFIG_OF, the ndfc driver produces
a harmless warning:

drivers/mtd/nand/raw/ndfc.c: In function 'ndfc_probe':
include/linux/dev_printk.h:154:31: error: 'len' is used uninitialized [-Werror=uninitialized]
  154 |         dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__)
      |                               ^
drivers/mtd/nand/raw/ndfc.c:196:17: note: in expansion of macro 'dev_err'
  196 |                 dev_err(&ofdev->dev, "unable read reg property (%d)\n", len);

Limit compile-testing to configurations with CONFIG_OF to trivially
avoid this. The driver will still be built in allmodconfig and many
randconfig builds.

Fixes: 4f2692a5383e ("mtd: rawnand: ndfc: use ioread32be/iowrite32be and allow COMPILE_TEST")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
We may also want to change the of_get_property() stub function to
initialize *len.
---
 drivers/mtd/nand/raw/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 64b8b99a3a68..1f4053e531fd 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -72,6 +72,7 @@ config MTD_NAND_AU1550
 config MTD_NAND_NDFC
 	tristate "IBM/MCC 4xx NAND controller"
 	depends on 44x || COMPILE_TEST
+	depends on OF
 	select MTD_NAND_ECC_SW_HAMMING
 	select MTD_NAND_ECC_SW_HAMMING_SMC
 	help
-- 
2.39.5


             reply	other threads:[~2026-06-18 20:58 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-18 20:58 Arnd Bergmann [this message]
2026-06-18 20:58 ` [PATCH] mtd: rawnand: ndfc: add CONFIG_OF dependency Arnd Bergmann

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