Hi,
Build failed commit 6642eb4eb918 ("ARM: imx: add missing iounmap()") on stable-rc/linux-4.19.y.
```` arch/arm/mach-imx/mmdc.c: In function 'imx_mmdc_probe': arch/arm/mach-imx/mmdc.c:568:2: error: 'err' undeclared (first use in this function) err = imx_mmdc_perf_init(pdev, mmdc_base); ^~~ arch/arm/mach-imx/mmdc.c:568:2: note: each undeclared identifier is reported only once for each function it appears in arch/arm/mach-imx/mmdc.c:573:1: error: control reaches end of non-void function [-Werror=return-type] } ^ cc1: some warnings being treated as errors make[1]: *** [scripts/Makefile.build:303: arch/arm/mach-imx/mmdc.o] Error 1
````
It seems that err has not been declared. I attached a patch which revise this issue.
Best regards, Nobuhiro