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From:   Arnd Bergmann <arnd@arndb.de>
To:     Mark Brown <broonie@kernel.org>
Cc:     cyrille.pitchen@microchip.com, Arnd Bergmann <arnd@arndb.de>,
        stable@vger.kernel.org,
        Boris Brezillon <boris.brezillon@bootlin.com>,
        Piotr Bugalski <bugalski.piotr@gmail.com>,
        linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mtd: atmel-quadspi: disallow building on ebsa110
Date:   Mon, 10 Dec 2018 21:38:16 +0100
Message-Id: <20181210203837.2118450-1-arnd@arndb.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

I ran into a link-time error with the atmel-quadspi driver on the
EBSA110 platform:

drivers/mtd/built-in.o: In function `atmel_qspi_run_command':
:(.text+0x1ee3c): undefined reference to `_memcpy_toio'
:(.text+0x1ee48): undefined reference to `_memcpy_fromio'

The problem is that _memcpy_toio/_memcpy_fromio are not available on
that platform, and we have to prevent building the driver there.

In case we want to backport this to older kernels: between linux-4.8
and linux-4.20, the Kconfig entry was in drivers/mtd/spi-nor/Kconfig
but had the same problem.

Link: https://lore.kernel.org/patchwork/patch/812860/
Fixes: 161aaab8a067 ("mtd: atmel-quadspi: add driver for Atmel QSPI controller")
Cc: stable@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/spi/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 55d5ffb50750..9f89cb134549 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -93,7 +93,7 @@ config SPI_AT91_USART
 
 config SPI_ATMEL_QUADSPI
 	tristate "Atmel Quad SPI Controller"
-	depends on ARCH_AT91 || (ARM && COMPILE_TEST)
+	depends on ARCH_AT91 || (ARM && COMPILE_TEST && !ARCH_EBSA110)
 	depends on OF && HAS_IOMEM
 	help
 	  This enables support for the Quad SPI controller in master mode.
-- 
2.18.0