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Uwe Kleine-König 1eea99c045 powerpc/legacy_serial: Handle SERIAL_8250_FSL=n build failures 
With SERIAL_8250=y and SERIAL_8250_FSL_CONSOLE=n the both
IS_ENABLED(CONFIG_SERIAL_8250) and IS_REACHABLE(CONFIG_SERIAL_8250)
evaluate to true and so fsl8250_handle_irq() is used. However this
function is only available if CONFIG_SERIAL_8250_CONSOLE=y (and thus
SERIAL_8250_FSL=y).

To prepare SERIAL_8250_FSL becoming tristate and being enabled in more
cases, check for IS_REACHABLE(CONFIG_SERIAL_8250_FSL) before making use
of fsl8250_handle_irq(). This check is correct with and without the
change to make SERIAL_8250_FSL modular.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Fixes: 66eff0ef52 ("powerpc/legacy_serial: Warn about 8250 devices operated without active FSL workarounds")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Message-ID: <20230609133932.786117-2-u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-06-13 12:27:04 +02:00
..
alpha Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
arc Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
arm i.MX fixes for 6.4: 2023-05-25 17:22:38 +02:00
arm64 ARM: 2023-06-04 07:16:53 -04:00
csky arch/csky patches for 6.4 2023-05-04 12:25:05 -07:00
hexagon Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
ia64 Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
loongarch Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
m68k m68k: Move signal frame following exception on 68020/030 2023-05-22 13:51:20 +02:00
microblaze Kconfig: introduce HAS_IOPORT option and select it as necessary 2023-04-05 22:15:19 +02:00
mips Merge 6.4-rc5 into tty-next 2023-06-05 07:41:04 +02:00
nios2 - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of 2023-04-27 19:42:02 -07:00
openrisc Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
parisc parisc: Fix flush_dcache_page() for usage from irq context 2023-05-24 19:03:49 +02:00
powerpc powerpc/legacy_serial: Handle SERIAL_8250_FSL=n build failures 2023-06-13 12:27:04 +02:00
riscv RISC-V Fixes for 6.4-rc5 2023-06-02 13:47:36 -04:00
s390 s390 updates for 6.4-rc3 2023-05-19 11:11:04 -07:00
sh Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
sparc Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
um um: harddog: fix modular build 2023-05-10 00:21:30 +02:00
x86 ARM: 2023-06-04 07:16:53 -04:00
xtensa Xtensa fixes for v6.4: 2023-05-23 15:21:34 -07:00
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