Created attachment 4946 [details]
Patch to fix issue

If you use BR2_LINUX_KERNEL_SOURCE_DIR and/or BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION along with BR2_LINUX_KERNEL_INTREE_DTS_NAME the kernel will fail to build.

1. BR2_LINUX_KERNEL_SOURCE_DIR is not properly added when LINUX_BUILD_DTB is defined so the make command fails.

2. BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION and BR2_LINUX_KERNEL_SOURCE_DIR are quoted strings and the "wildcard" call can't handle if a double-quote is contained within it (which happens if BR2_LINUX_KERNEL_INTREE_DTS_NAME or BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION are defined). So if you are using a kernel newer than 3.8, it will fail the new test and look for the dtb without the dts/ sub-directory.

linux/linux.mk:
		$(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
		$(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
		$(BINARIES_DIR)/

The attached patch fixes both issues.