linux-kernel - [PATCH 1/4] DMA: ALTERA_MSGDMA depends on HAS

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Date:   Fri, 21 May 2021 19:13:10 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>, Stefan Roese <sr@...x.de>,
        Vinod Koul <vkoul@...nel.org>, dmaengine@...r.kernel.org,
        Sinan Kaya <okaya@...eaurora.org>,
        Green Wan <green.wan@...ive.com>,
        Hyun Kwon <hyun.kwon@...inx.com>,
        Tejas Upadhyay <tejasu@...inx.com>,
        Michal Simek <michal.simek@...inx.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH 1/4] DMA: ALTERA_MSGDMA depends on HAS_IOMEM

When CONFIG_HAS_IOMEM is not set/enabled, certain iomap() family
functions [including ioremap(), devm_ioremap(), etc.] are not
available.
Drivers that use these functions should depend on HAS_IOMEM so that
they do not cause build errors.

Repairs this build error:
s390-linux-ld: drivers/dma/altera-msgdma.o: in function `request_and_map':
altera-msgdma.c:(.text+0x14b0): undefined reference to `devm_ioremap'

Fixes: a85c6f1b2921 ("dmaengine: Add driver for Altera / Intel mSGDMA IP core")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Reported-by: kernel test robot <lkp@...el.com>
Cc: Stefan Roese <sr@...x.de>
Cc: Vinod Koul <vkoul@...nel.org>
Cc: dmaengine@...r.kernel.org
---
 drivers/dma/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20210521.orig/drivers/dma/Kconfig
+++ linux-next-20210521/drivers/dma/Kconfig
@@ -59,6 +59,7 @@ config DMA_OF
 #devices
 config ALTERA_MSGDMA
 	tristate "Altera / Intel mSGDMA Engine"
+	depends on HAS_IOMEM
 	select DMA_ENGINE
 	help
 	  Enable support for Altera / Intel mSGDMA controller.