[PATCH] drivers: serial: Fix dev_read_addr error check

[Francois Berder]

dev_read_addr returns FDT_ADDR_T_NONE (-1) in case of error
and not 0.

Signed-off-by: Francois Berder <fber...@outlook.fr>
---
 drivers/serial/serial_sh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c
index bc205234e24..7debff6cb3a 100644
--- a/drivers/serial/serial_sh.c
+++ b/drivers/serial/serial_sh.c
@@ -257,7 +257,7 @@ static int sh_serial_of_to_plat(struct udevice *dev)
        int ret;
 
        addr = dev_read_addr(dev);
-       if (!addr)
+       if (addr == FDT_ADDR_T_NONE)
                return -EINVAL;
 
        plat->base = addr;
-- 
2.43.0