stdio: Add force parameter to stdio_deregister
In some cases we really want to move forward with a deregister, add a force
parameter to allow this, and replace the dev with a nulldev in this case.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/common/stdio.c b/common/stdio.c
index c878103..8232815 100644
--- a/common/stdio.c
+++ b/common/stdio.c
@@ -34,6 +34,9 @@
#define CONFIG_SYS_DEVICE_NULLDEV 1
#endif
+#ifdef CONFIG_SYS_STDIO_DEREGISTER
+#define CONFIG_SYS_DEVICE_NULLDEV 1
+#endif
#ifdef CONFIG_SYS_DEVICE_NULLDEV
void nulldev_putc(struct stdio_dev *dev, const char c)
@@ -172,7 +175,7 @@
* returns 0 if success, -1 if device is assigned and 1 if devname not found
*/
#ifdef CONFIG_SYS_STDIO_DEREGISTER
-int stdio_deregister_dev(struct stdio_dev *dev)
+int stdio_deregister_dev(struct stdio_dev *dev, int force)
{
int l;
struct list_head *pos;
@@ -181,6 +184,10 @@
/* get stdio devices (ListRemoveItem changes the dev list) */
for (l=0 ; l< MAX_FILES; l++) {
if (stdio_devices[l] == dev) {
+ if (force) {
+ strcpy(temp_names[l], "nulldev");
+ continue;
+ }
/* Device is assigned -> report error */
return -1;
}
@@ -202,7 +209,7 @@
return 0;
}
-int stdio_deregister(const char *devname)
+int stdio_deregister(const char *devname, int force)
{
struct stdio_dev *dev;
@@ -211,7 +218,7 @@
if (!dev) /* device not found */
return -ENODEV;
- return stdio_deregister_dev(dev);
+ return stdio_deregister_dev(dev, force);
}
#endif /* CONFIG_SYS_STDIO_DEREGISTER */
diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index d4d5f48..dcb693d 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -550,7 +550,7 @@
int usb_kbd_deregister(void)
{
#ifdef CONFIG_SYS_STDIO_DEREGISTER
- int ret = stdio_deregister(DEVNAME);
+ int ret = stdio_deregister(DEVNAME, 0);
if (ret && ret != -ENODEV)
return ret;
diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c
index 1ac943f..fd010ca 100644
--- a/drivers/serial/serial-uclass.c
+++ b/drivers/serial/serial-uclass.c
@@ -198,7 +198,7 @@
#ifdef CONFIG_SYS_STDIO_DEREGISTER
struct serial_dev_priv *upriv = dev->uclass_priv;
- if (stdio_deregister_dev(upriv->sdev))
+ if (stdio_deregister_dev(upriv->sdev), 0)
return -EPERM;
#endif
diff --git a/include/stdio_dev.h b/include/stdio_dev.h
index 268de8e..24da23f 100644
--- a/include/stdio_dev.h
+++ b/include/stdio_dev.h
@@ -103,8 +103,8 @@
void stdio_print_current_devices(void);
#ifdef CONFIG_SYS_STDIO_DEREGISTER
-int stdio_deregister(const char *devname);
-int stdio_deregister_dev(struct stdio_dev *dev);
+int stdio_deregister(const char *devname, int force);
+int stdio_deregister_dev(struct stdio_dev *dev, int force);
#endif
struct list_head* stdio_get_list(void);
struct stdio_dev* stdio_get_by_name(const char* name);