[PATCH 1/1] serial: move sbi_dbcn_available to .data section

[Heinrich Schuchardt]

U-Boot SPL loads the device-tree directly behind main U-Boot overlapping
the .bss section. reserve_fdt() is called in board_init_f() to relocate the
device-tree to a safe location.

Debug UARTs are enabled before board_init_f(). With sbi_dbcn_available in
the .bss section the device-tree is corrupted when _debug_uart_init() is
called in the SBI serial driver. Move the variable to the .data section.

Link: https://bugs.launchpad.net/ubuntu/+source/u-boot/+bug/2054091
Fixes: dfe08374943c ("risc-v: implement DBCN based debug console")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 drivers/serial/serial_sbi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/serial/serial_sbi.c b/drivers/serial/serial_sbi.c
index a51a96c1ef0..f3ecfccab43 100644
--- a/drivers/serial/serial_sbi.c
+++ b/drivers/serial/serial_sbi.c
@@ -17,7 +17,7 @@ static inline void _debug_uart_putc(int c)
 
 #else
 
-static int sbi_dbcn_available;
+static int sbi_dbcn_available __section(".data");
 
 static inline void _debug_uart_init(void)
 {
-- 
2.43.0