[PATCH v6 09/16] printk: Do not quietly ignore adding entry for a preferred console when there is no space

[Petr Mladek <pmladek@suse.com>]

It is hard to imagine that anyone would want to add more than 8 preferred
consoles. But never say never. And do not ignore new entries quietly.

Signed-off-by: Petr Mladek <pmladek@suse.com>
Acked-by: Chris Down <chris@chrisdown.name>
Reviewed-by: John Ogness <john.ogness@linutronix.de>
---
 kernel/printk/printk.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 60923b997e4f..1eb542a321a5 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2578,8 +2578,10 @@ static int add_or_update_preferred_console(unsigned int i,
 	struct preferred_console *pc;
 	bool is_new_entry = false;
 
-	if (i >= MAX_PREFERRED_CONSOLES)
+	if (i >= MAX_PREFERRED_CONSOLES) {
+		pr_err_once("Reached maximal number of preferred consoles.\n");
 		return -E2BIG;
+	}
 
 	pc = &preferred_consoles[i];
 
-- 
2.56.0