[PATCH v2] serial: ns16550: Fix return-type warning

[Nikita Shubin]

Fix compiler warning:

drivers/serial/ns16550.c: In function ‘serial_in_dynamic’:
drivers/serial/ns16550.c:153:1: warning: control reaches end
    of non-void function [-Wreturn-type]
  153 | }
      | ^

Observed with gcc 15.2.1:

$ riscv64-unknown-linux-gnu-gcc --version
riscv64-unknown-linux-gnu-gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1

Fixes: 62cbde4c4e46 ("serial: ns16550: Support run-time configuration")
Signed-off-by: Nikita Shubin <nikita.shubin at maquefel.me>
---
Changes in v2:
Tom:
- specified gcc version in commit message

- Link to v1: https://lore.kernel.org/r/20260226-serial_ns16550_fix_warning-v1-1-ea563e6a26e4@maquefel.me
---
 drivers/serial/ns16550.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 4f7de3ea215..71e2bc026cb 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -140,9 +140,9 @@ static int serial_in_dynamic(struct ns16550_plat *plat, u8 *addr)
 		}
 	} else if (plat->flags & NS16550_FLAG_BE) {
 		return readb(addr + (1 << plat->reg_shift) - 1);
-	} else {
-		return readb(addr);
 	}
+
+	return readb(addr);
 }
 #else
 static inline void serial_out_dynamic(struct ns16550_plat *plat, u8 *addr,

---
base-commit: 7995bf8dea2d5b3eb7fcb836636f4773924ec35d
change-id: 20260226-serial_ns16550_fix_warning-51617ddbfb31

Best regards,
-- 
Nikita Shubin