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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-02-03 15:31:30 +0200
committerPetr Mladek <pmladek@suse.com>2020-02-11 10:44:22 +0100
commited31685c96e18f773ca11dd1a637974d62130673 (patch)
tree0cb9fcbf8d3ebb43a1382f6a2ed757547963e2b9 /kernel/printk
parente78bedbd42b7caa65551f3d56cbff451ccbd0aee (diff)
console: Introduce ->exit() callback
Some consoles might require special operations on unregistering. For instance, serial console, when registered in the kernel, keeps power on for entire time, until it gets unregistered. Example of use: ->setup(console): pm_runtime_get(...); ->exit(console): pm_runtime_put(...); For such cases to have a balance we would provide ->exit() callback. Link: http://lkml.kernel.org/r/20200203133130.11591-7-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>
Diffstat (limited to 'kernel/printk')
-rw-r--r--kernel/printk/printk.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index f435a17ef988..633f41a11d75 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2853,6 +2853,9 @@ int unregister_console(struct console *console)
console_unlock();
console_sysfs_notify();
+ if (console->exit)
+ res = console->exit(console);
+
return res;
out_disable_unlock: