When nr_uarts was set to 0 (via config or 8250_core.nr_uarts), we crash
early on x86 because serial8250_isa_init_ports dereferences base_ops
which remains NULL. In fact, there is nothing to do for that function if
there are no uarts.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
drivers/tty/serial/8250/8250_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/8250/8250_core.c
b/drivers/tty/serial/8250/8250_core.c
index 4506e40..e1363a40 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -3256,7 +3256,7 @@ static void __init serial8250_isa_init_ports(void)
static int first = 1;
int i, irqflag = 0;
- if (!first)
+ if (!first || nr_uarts == 0)
return;
first = 0;
--
2.1.4
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