From: Zhaoyang Yu <2426767509@qq.com>
To: gregkh@linuxfoundation.org, jirislaby@kernel.org,
shawnguo@kernel.org, s.hauer@pengutronix.de
Cc: kernel@pengutronix.de, festevam@gmail.com,
linux-serial@vger.kernel.org, imx@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Zhaoyang Yu <2426767509@qq.com>
Subject: [PATCH] serial: auart: check clk_enable() return in console write
Date: Sun, 1 Mar 2026 16:22:56 +0000 [thread overview]
Message-ID: <tencent_AB29FADF1FAD67D818283B6BB4FDF66F2F08@qq.com> (raw)
Add a check for clk_enable() in auart_console_write(). If
clk_enable() fails, return immediately to avoid accessing
hardware registers while the clock is not enabled.
Signed-off-by: Zhaoyang Yu <2426767509@qq.com>
---
drivers/tty/serial/mxs-auart.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index cc65c9fb6446..693b491f1e75 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -1318,7 +1318,8 @@ auart_console_write(struct console *co, const char *str, unsigned int count)
s = auart_port[co->index];
port = &s->port;
- clk_enable(s->clk);
+ if (clk_enable(s->clk))
+ return;
/* First save the CR then disable the interrupts */
old_ctrl2 = mxs_read(s, REG_CTRL2);
--
2.34.1
next reply other threads:[~2026-03-01 16:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-01 16:22 Zhaoyang Yu [this message]
2026-03-02 21:47 ` [PATCH] serial: auart: check clk_enable() return in console write Frank Li
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