diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-02-03 16:31:29 +0300 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2020-02-11 12:44:17 +0300 |
| commit | e78bedbd42b7caa65551f3d56cbff451ccbd0aee (patch) | |
| tree | 4d4c53cf8b02afe554c90da41d32290af97c40ed | |
| parent | bb72e3981d8e7bb80db7cebc57a4e10769a509c9 (diff) | |
| download | linux-e78bedbd42b7caa65551f3d56cbff451ccbd0aee.tar.xz | |
console: Don't notify user space when unregister non-listed console
If console is not on the list then there is nothing for us to do
and sysfs notify is pointless.
Note, that nr_ext_console_drivers is being changed only for listed
consoles.
Suggested-by: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Link: http://lkml.kernel.org/r/20200203133130.11591-6-andriy.shevchenko@linux.intel.com
To: linux-kernel@vger.kernel.org
To: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
| -rw-r--r-- | kernel/printk/printk.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 61d188f4c672..f435a17ef988 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2836,7 +2836,10 @@ int unregister_console(struct console *console) } } - if (!res && (console->flags & CON_EXTENDED)) + if (res) + goto out_disable_unlock; + + if (console->flags & CON_EXTENDED) nr_ext_console_drivers--; /* @@ -2849,6 +2852,13 @@ int unregister_console(struct console *console) console->flags &= ~CON_ENABLED; console_unlock(); console_sysfs_notify(); + + return res; + +out_disable_unlock: + console->flags &= ~CON_ENABLED; + console_unlock(); + return res; } EXPORT_SYMBOL(unregister_console); |