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bh=gdiyFjvMqWMG/af6i2COjazfjxZBQgaYcm1PP8azrvk=; b=IWC6hzHt+hGgDxM8mnhmOKjK757opWdvGQIPrJ3S1sCrDPlWBKRCNmyI WkGNJg1nbwrHGt0hybHhtSNKtWLhEcm1GOdFE6qIUV5EwZNj3Q1o5BAt9 FWKtG/ludALKUDMf4YAMM+By83qOCitlD3yGyrrHi9ZzIdJprr8XHxyXa npxwAFEokZiWIetHfUHRqzC54fEfMtHWKtt/xQ21kPIr/6WZX6hvgJ4WN 6CCgWYvGTQuC6+duNL7wvvSsWTgbdfhYjVn2jQa0TDFo+2NopWKIuscQ9 uX+ctZsI+4jgHf/75tq1fX5Zv4NGM8tVCJKtFll+SYteqZsQeKimV+oeW A==; X-IronPort-AV: E=McAfee;i="6600,9927,10961"; a="14770175" X-IronPort-AV: E=Sophos;i="6.05,213,1701158400"; d="scan'208";a="14770175" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2024 21:40:51 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,213,1701158400"; d="scan'208";a="1472008" Received: from junxiaochang.bj.intel.com ([10.238.157.86]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2024 21:40:47 -0800 From: Junxiao Chang To: bigeasy@linutronix.de, tglx@linutronix.de, rostedt@goodmis.org, linux-kernel@vger.kernel.org Cc: john.ogness@linutronix.de, hao3.li@intel.com, lili.li@intel.com, jianfeng.gao@intel.com, linux-rt-users@vger.kernel.org Subject: [PATCH 2/2] printk: nbcon: check uart port is nbcon or not in nbcon_release Date: Tue, 23 Jan 2024 13:40:33 +0800 Message-Id: <20240123054033.183114-3-junxiao.chang@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240123054033.183114-1-junxiao.chang@intel.com> References: <20240123054033.183114-1-junxiao.chang@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788319507926157549 X-GMAIL-MSGID: 1788858795651105953 Try to release nbcon only if current uart port is nbcon, as it does in nbcon_acquire. Signed-off-by: Junxiao Chang --- kernel/printk/nbcon.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/printk/nbcon.c b/kernel/printk/nbcon.c index b53d93585ee71..d8c6f30adde8b 100644 --- a/kernel/printk/nbcon.c +++ b/kernel/printk/nbcon.c @@ -1623,6 +1623,9 @@ void nbcon_release(struct uart_port *up) .prio = NBCON_PRIO_NORMAL, }; + if (!uart_is_nbcon(up)) + return; + if (!up->nbcon_locked_port) return;