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-rw-r--r--target/linux/x86/image/Makefile6
1 files changed, 4 insertions, 2 deletions
diff --git a/target/linux/x86/image/Makefile b/target/linux/x86/image/Makefile
index 039d70ab82..d3ada9fad2 100644
--- a/target/linux/x86/image/Makefile
+++ b/target/linux/x86/image/Makefile
@@ -28,8 +28,10 @@ ifneq ($(CONFIG_X86_GRUB_CONSOLE),)
GRUB_TERMINALS += console
endif
-ifneq ($(CONFIG_X86_GRUB_SERIAL),)
- GRUB_CONSOLE_CMDLINE += console=$(call qstrip,$(CONFIG_X86_GRUB_SERIAL)),$(CONFIG_X86_GRUB_BAUDRATE)n8
+GRUB_SERIAL:=$(call qstrip,$(CONFIG_X86_GRUB_SERIAL))
+
+ifneq ($(GRUB_SERIAL),)
+ GRUB_CONSOLE_CMDLINE += console=$(GRUB_SERIAL),$(CONFIG_X86_GRUB_BAUDRATE)n8
GRUB_SERIAL_CONFIG := serial --unit=0 --speed=$(CONFIG_X86_GRUB_BAUDRATE) --word=8 --parity=no --stop=1
GRUB_TERMINALS += serial
endif