[PATCH 05/58] tty/serial: Migrate 8250_fsl to use has_sysrq

[Dmitry Safonov]

The SUPPORT_SYSRQ ifdeffery is not nice as:
- May create misunderstanding about sizeof(struct uart_port) between
  different objects
- Prevents moving functions from serial_core.h
- Reduces readability (well, it's ifdeffery - it's hard to follow)

In order to remove SUPPORT_SYSRQ, has_sysrq variable has been added.
Initialise it in driver's probe and remove ifdeffery.

Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: linuxppc-dev at lists.ozlabs.org
Signed-off-by: Dmitry Safonov <dima at arista.com>
---
 arch/powerpc/kernel/legacy_serial.c | 4 +++-
 drivers/tty/serial/8250/8250_fsl.c  | 4 ----
 drivers/tty/serial/8250/8250_of.c   | 4 +++-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 7cea5978f21f..f061e06e9f51 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -479,8 +479,10 @@ static void __init fixup_port_irq(int index,
 	port->irq = virq;
 
 #ifdef CONFIG_SERIAL_8250_FSL
-	if (of_device_is_compatible(np, "fsl,ns16550"))
+	if (of_device_is_compatible(np, "fsl,ns16550")) {
 		port->handle_irq = fsl8250_handle_irq;
+		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
+	}
 #endif
 }
 
diff --git a/drivers/tty/serial/8250/8250_fsl.c b/drivers/tty/serial/8250/8250_fsl.c
index aa0e216d5ead..0d0c80905c58 100644
--- a/drivers/tty/serial/8250/8250_fsl.c
+++ b/drivers/tty/serial/8250/8250_fsl.c
@@ -1,8 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0
-#if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
 #include <linux/serial_reg.h>
 #include <linux/serial_8250.h>
 
diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c
index 92fbf46ce3bd..531ad67395e0 100644
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -222,8 +222,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
 
 	if (IS_ENABLED(CONFIG_SERIAL_8250_FSL) &&
 	    (of_device_is_compatible(np, "fsl,ns16550") ||
-	     of_device_is_compatible(np, "fsl,16550-FIFO64")))
+	     of_device_is_compatible(np, "fsl,16550-FIFO64"))) {
 		port->handle_irq = fsl8250_handle_irq;
+		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
+	}
 
 	return 0;
 err_unprepare:
-- 
2.24.0