57 lines
1.7 KiB
Diff
57 lines
1.7 KiB
Diff
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From 77ffd487daf6eae805beb3f0980404e23cb68ea1 Mon Sep 17 00:00:00 2001
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From: John Ogness <john.ogness@linutronix.de>
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Date: Wed, 22 Nov 2023 11:23:43 +0000
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Subject: [PATCH 126/195] printk: Consider nbcon boot consoles on seq init
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If a non-boot console is registering and boot consoles exist, the
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consoles are flushed before being unregistered. This allows the
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non-boot console to continue where the boot console left off.
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If for whatever reason flushing fails, the lowest seq found from
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any of the enabled boot consoles is used. Until now con->seq was
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checked. However, if it is an nbcon boot console, the function
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nbcon_seq_read() must be used to read seq because con->seq is
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always 0.
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Check if it is an nbcon boot console and if so call
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nbcon_seq_read() to read seq.
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Signed-off-by: John Ogness <john.ogness@linutronix.de>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/printk/printk.c | 17 +++++++++++++----
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1 file changed, 13 insertions(+), 4 deletions(-)
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diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
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index 15cc485109a5..87d3510e3e45 100644
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--- a/kernel/printk/printk.c
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+++ b/kernel/printk/printk.c
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@@ -3392,11 +3392,20 @@ static void console_init_seq(struct console *newcon, bool bootcon_registered)
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newcon->seq = prb_next_seq(prb);
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for_each_console(con) {
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- if ((con->flags & CON_BOOT) &&
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- (con->flags & CON_ENABLED) &&
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- con->seq < newcon->seq) {
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- newcon->seq = con->seq;
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+ u64 seq;
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+
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+ if (!((con->flags & CON_BOOT) &&
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+ (con->flags & CON_ENABLED))) {
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+ continue;
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}
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+
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+ if (con->flags & CON_NBCON)
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+ seq = nbcon_seq_read(con);
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+ else
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+ seq = con->seq;
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+
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+ if (seq < newcon->seq)
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+ newcon->seq = seq;
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}
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}
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--
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2.43.0
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