If the 8250 driver is built as a module (or built-in without console
support) the Freescale specific workaround were silently not activated.
Add a warning in this case.
Currently CONFIG_SERIAL_8250_FSL=y implies that the function
fsl8250_handle_irq() is built-in and can be used. However with the
changes of the next commit CONFIG_SERIAL_8250_FSL might be enabled also
when the 8250 driver is a module and so more care is needed when
fsl8250_handle_irq() is to be used. The code added here is able to
handle the new situation already.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
arch/powerpc/kernel/legacy_serial.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index c9ad12461d44..fdbd85aafeb1 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -508,12 +508,16 @@ static void __init fixup_port_irq(int index,
port->irq = virq;
-#ifdef CONFIG_SERIAL_8250_FSL
- if (of_device_is_compatible(np, "fsl,ns16550")) {
- port->handle_irq = fsl8250_handle_irq;
- port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
+ if (IS_ENABLED(CONFIG_SERIAL_8250) &&
+ of_device_is_compatible(np, "fsl,ns16550")) {
+ if (IS_REACHABLE(CONFIG_SERIAL_8250)) {
+ port->handle_irq = fsl8250_handle_irq;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
+ } else {
+ pr_warn_once("Not activating Freescale specific workaround for device %pOFP\n",
+ np);
+ }
}
-#endif
}
static void __init fixup_port_pio(int index,
--
2.39.2
