linux-kernel - [PATCH v1 1/1] serial: 8250_ce4100: Fix CONFIG_SERIAL

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Message-ID: <20250716094433.1611477-1-andriy.shevchenko@linux.intel.com>
Date: Wed, 16 Jul 2025 12:44:33 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Cc: Jiri Slaby <jirislaby@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Randy Dunlap <rdunlap@...radead.org>
Subject: [PATCH v1 1/1] serial: 8250_ce4100: Fix CONFIG_SERIAL_8250=n build

On i386, when

  CONFIG_X86_INTEL_CE=y
  # CONFIG_SERIAL_8250 is not set

will try to compile the driver and use the stub simultaneously.
This breaks the build. Fix it by making sure that the driver
compiles only when CONFIG_SERIAL_8250 is also enabled.

Fixes: acc902de05b2 ("serial: 8250: Move CE4100 quirks to a module under 8250 driver")
Reported-by: Randy Dunlap <rdunlap@...radead.org>
Closes: https://lore.kernel.org/r/cdf4ee46-7bf8-4379-9245-fed9db72e7e8@infradead.org
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/tty/serial/8250/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index e61dc3f4ca50..1d6633bbcd70 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -24,7 +24,9 @@ obj-$(CONFIG_SERIAL_8250_ASPEED_VUART)	+= 8250_aspeed_vuart.o
 obj-$(CONFIG_SERIAL_8250_BCM2835AUX)	+= 8250_bcm2835aux.o
 obj-$(CONFIG_SERIAL_8250_BCM7271)	+= 8250_bcm7271.o
 obj-$(CONFIG_SERIAL_8250_BOCA)		+= 8250_boca.o
+ifneq ($(CONFIG_SERIAL_8250),)
 obj-$(CONFIG_X86_INTEL_CE)		+= 8250_ce4100.o
+endif
 obj-$(CONFIG_SERIAL_8250_DFL)		+= 8250_dfl.o
 obj-$(CONFIG_SERIAL_8250_DW)		+= 8250_dw.o
 obj-$(CONFIG_SERIAL_8250_EM)		+= 8250_em.o
-- 
2.47.2