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| author | Zhaoyang Yu <2426767509@qq.com> | 2026-03-01 16:22:56 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-12 15:24:23 +0100 |
| commit | 2c8c3487b25b2e599528299224a54941e0b835ed (patch) | |
| tree | 45c7d5e32d55e3b205545ef6b687dc3986d80869 /drivers/tty | |
| parent | c1d2deb6492fbd900392f4ebd47572ca4903d0fe (diff) | |
| download | linux-next-2c8c3487b25b2e599528299224a54941e0b835ed.tar.gz linux-next-2c8c3487b25b2e599528299224a54941e0b835ed.zip | |
serial: auart: check clk_enable() return in console write
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>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/tencent_AB29FADF1FAD67D818283B6BB4FDF66F2F08@qq.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/mxs-auart.c | 3 |
1 files changed, 2 insertions, 1 deletions
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); |