Messages in this thread Patch in this message | | | From | Andy Shevchenko <> | Subject | [PATCH v2 5/5] console: Introduce ->exit() callback | Date | Fri, 24 Jan 2020 17:57:32 +0200 |
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Some consoles might require special operations on unregistering. For example, serial console, when registered in the kernel, keeps power on for entire time, until it gets unregistered. For such cases to have a balance we would provide ->exit() callback.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- v2: new patch include/linux/console.h | 1 + kernel/printk/printk.c | 3 +++ 2 files changed, 4 insertions(+)
diff --git a/include/linux/console.h b/include/linux/console.h index f33016b3a401..54759ad0c36b 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -148,6 +148,7 @@ struct console { struct tty_driver *(*device)(struct console *, int *); void (*unblank)(void); int (*setup)(struct console *, char *); + void (*exit)(struct console *); int (*match)(struct console *, char *name, int idx, char *options); short flags; short index; diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index da6a9bdf76b6..0319bb698d05 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2850,6 +2850,9 @@ int unregister_console(struct console *console) if (console_drivers != NULL && console->flags & CON_CONSDEV) console_drivers->flags |= CON_CONSDEV; + if (console->exit) + console->exit(console); + console->flags &= ~CON_ENABLED; console_unlock(); console_sysfs_notify(); -- 2.24.1
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