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-rw-r--r--arch/powerpc/kernel/udbg_16550.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c
index 75702e207b29..f7089fcfaa5d 100644
--- a/arch/powerpc/kernel/udbg_16550.c
+++ b/arch/powerpc/kernel/udbg_16550.c
@@ -69,8 +69,12 @@ static void udbg_uart_putc(char c)
static int udbg_uart_getc_poll(void)
{
- if (!udbg_uart_in || !(udbg_uart_in(UART_LSR) & LSR_DR))
+ if (!udbg_uart_in)
+ return -1;
+
+ if (!(udbg_uart_in(UART_LSR) & LSR_DR))
return udbg_uart_in(UART_RBR);
+
return -1;
}