From: Arnd Bergmann <arnd@arndb.de>

When the NAND driver is a loadable module, and the SPI driver is
turned off, the common part is not built:

ERROR: modpost: "qcom_nandc_unalloc" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_write_reg_dma" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_read_reg_dma" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_nandc_dev_to_mem" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_nandc_alloc" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_submit_descs" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_clear_read_regs" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_clear_bam_transaction" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_read_data_dma" [drivers/spi/spi-qpic-snand.ko] undefined!
ERROR: modpost: "qcom_write_data_dma" [drivers/spi/spi-qpic-snand.ko] undefined!

Simplify the Makefile to just build the common bits for either of the two,
so it will be built-in whenever one of them is, or otherwise a loadable
module if needed.

Fixes: 7304d1909080 ("spi: spi-qpic: add driver for QCOM SPI NAND flash Interface")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/mtd/nand/Makefile | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index db516a45f0c5..44913ff1bf12 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -3,11 +3,8 @@
 nandcore-objs := core.o bbt.o
 obj-$(CONFIG_MTD_NAND_CORE) += nandcore.o
 obj-$(CONFIG_MTD_NAND_ECC_MEDIATEK) += ecc-mtk.o
-ifeq ($(CONFIG_SPI_QPIC_SNAND),y)
 obj-$(CONFIG_SPI_QPIC_SNAND) += qpic_common.o
-else
 obj-$(CONFIG_MTD_NAND_QCOM) += qpic_common.o
-endif
 obj-y	+= onenand/
 obj-y	+= raw/
 obj-y	+= spi/
-- 
2.39.5

Hi Arnd,

On 07/04/2025 at 09:27:14 +02, Arnd Bergmann <arnd@kernel.org> wrote:

> From: Arnd Bergmann <arnd@arndb.de>
>
> When the NAND driver is a loadable module, and the SPI driver is
> turned off, the common part is not built:
>
> ERROR: modpost: "qcom_nandc_unalloc" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_write_reg_dma" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_read_reg_dma" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_nandc_dev_to_mem" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_nandc_alloc" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_submit_descs" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_clear_read_regs" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_clear_bam_transaction" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_read_data_dma" [drivers/spi/spi-qpic-snand.ko] undefined!
> ERROR: modpost: "qcom_write_data_dma" [drivers/spi/spi-qpic-snand.ko] undefined!
>
> Simplify the Makefile to just build the common bits for either of the two,
> so it will be built-in whenever one of them is, or otherwise a loadable
> module if needed.
>
> Fixes: 7304d1909080 ("spi: spi-qpic: add driver for QCOM SPI NAND flash Interface")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Thanks for the fix, I just applied Geert's identical patch this morning,
I was waiting for -rc1 to synchronize everything again:
https://lore.kernel.org/linux-mtd/174401012746.998658.11206994348683987630.b4-ty@bootlin.com/T/#t

Sorry for the delay.

Thanks,
Miquèl