6.4-stable review patch. If anyone has any objections, please let me know.
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From: Baoquan He bhe@redhat.com
[ Upstream commit b1e213a9e31c20206f111ec664afcf31cbfe0dbb ]
On s390 systems (aka mainframes), it has classic channel devices for networking and permanent storage that are currently even more common than PCI devices. Hence it could have a fully functional s390 kernel with CONFIG_PCI=n, then the relevant iomem mapping functions [including ioremap(), devm_ioremap(), etc.] are not available.
Here let FSL_EDMA and INTEL_IDMA64 depend on HAS_IOMEM so that it won't be built to cause below compiling error if PCI is unset.
-------- ERROR: modpost: "devm_platform_ioremap_resource" [drivers/dma/fsl-edma.ko] undefined! ERROR: modpost: "devm_platform_ioremap_resource" [drivers/dma/idma64.ko] undefined! --------
Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/ Signed-off-by: Baoquan He bhe@redhat.com Cc: Vinod Koul vkoul@kernel.org Cc: dmaengine@vger.kernel.org Link: https://lore.kernel.org/r/20230707135852.24292-2-bhe@redhat.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/Kconfig | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index f5f422f9b8507..b6221b4432fd3 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -211,6 +211,7 @@ config FSL_DMA config FSL_EDMA tristate "Freescale eDMA engine support" depends on OF + depends on HAS_IOMEM select DMA_ENGINE select DMA_VIRTUAL_CHANNELS help @@ -280,6 +281,7 @@ config IMX_SDMA
config INTEL_IDMA64 tristate "Intel integrated DMA 64-bit support" + depends on HAS_IOMEM select DMA_ENGINE select DMA_VIRTUAL_CHANNELS help