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| author | Wentao Wang <witallwang@gmail.com> | 2019-03-20 18:30:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-03 07:26:26 +0300 |
| commit | c956914f1efa6d4771881d49d3d08850048b3fec (patch) | |
| tree | 17c3800ed7eaae123773ea03f7badd81afc4583d /drivers/tty | |
| parent | 1c992ea006ce2b7c79862943d275145986b28ea0 (diff) | |
| download | linux-c956914f1efa6d4771881d49d3d08850048b3fec.tar.xz | |
Disable kgdboc failed by echo space to /sys/module/kgdboc/parameters/kgdboc
commit 3ec8002951ea173e24b466df1ea98c56b7920e63 upstream.
Echo "" to /sys/module/kgdboc/parameters/kgdboc will fail with "No such
device” error.
This is caused by function "configure_kgdboc" who init err to ENODEV
when the config is empty (legal input) the code go out with ENODEV
returned.
Fixes: 2dd453168643 ("kgdboc: Fix restrict error")
Signed-off-by: Wentao Wang <witallwang@gmail.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/kgdboc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c index 93d3a0ec5e11..b0aa864f84a9 100644 --- a/drivers/tty/serial/kgdboc.c +++ b/drivers/tty/serial/kgdboc.c @@ -145,8 +145,10 @@ static int configure_kgdboc(void) char *cptr = config; struct console *cons; - if (!strlen(config) || isspace(config[0])) + if (!strlen(config) || isspace(config[0])) { + err = 0; goto noconfig; + } kgdboc_io_ops.is_console = 0; kgdb_tty_driver = NULL; |