From: Robert Jarzmik <robert.jarzmik@xxxxxxxxxxxxxx>
Some console are transient, like the USB connected serial
console which should be removed when the USB connection is
severed.
Enable console removal for such devices.
Signed-off-by: Robert Jarzmik <robert.jarzmik@xxxxxxx>
---
common/console.c | 24 ++++++++++++++++++------
common/console_simple.c | 4 ++++
include/console.h | 1 +
3 files changed, 23 insertions(+), 6 deletions(-)
diff --git a/common/console.c b/common/console.c
index 06e9c29..706d9b2 100644
--- a/common/console.c
+++ b/common/console.c
@@ -154,13 +154,9 @@ int console_register(struct console_device *newcdev)
list_add_tail(&newcdev->list, &console_list);
- if (console_output_buffer) {
- while (kfifo_getc(console_output_buffer, &ch) == 0)
- console_putc(CONSOLE_STDOUT, ch);
- kfifo_free(console_output_buffer);
- console_output_buffer = NULL;
- }
+ while (kfifo_getc(console_output_buffer, &ch) == 0)
+ console_putc(CONSOLE_STDOUT, ch);
if (first)
barebox_banner();
@@ -168,6 +164,22 @@ int console_register(struct console_device *newcdev)
}
EXPORT_SYMBOL(console_register);
+int console_unregister(struct console_device *cdev)
+{
+ struct device_d *dev = &cdev->class_dev;
+ int status;
+
+ list_del(&cdev->list);
+ if (list_empty(&console_list))
+ initialized = CONSOLE_UNINITIALIZED;
+
+ status = unregister_device(dev);
+ if (!status)
+ memset(cdev, 0, sizeof(*cdev));
+ return status;
+}
+EXPORT_SYMBOL(console_unregister);
+
static int getc_raw(void)
{
struct console_device *cdev;
diff --git a/common/console_simple.c b/common/console_simple.c
index 7304d8e..7e0619d 100644
--- a/common/console_simple.c
+++ b/common/console_simple.c
@@ -157,3 +157,7 @@ int console_register(struct console_device *newcdev)
}
return 0;
}
+
+int console_unregister(struct console_device *cdev)
+{
+}
diff --git a/include/console.h b/include/console.h
index 3bcc5db..c0817f6 100644
--- a/include/console.h
+++ b/include/console.h
@@ -49,6 +49,7 @@ struct console_device {
};
int console_register(struct console_device *cdev);
+int console_unregister(struct console_device *cdev);
extern struct list_head console_list;
#define for_each_console(console) list_for_each_entry(console, &console_list, list)
--
1.7.5.4
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