mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-03-19 21:44:08 +00:00
Merge branch 'console-registration-cleanup' into for-linus
This commit is contained in:
commit
d12013c80e
1 changed files with 58 additions and 46 deletions
|
@ -280,7 +280,6 @@ static struct console *exclusive_console;
|
|||
static struct console_cmdline console_cmdline[MAX_CMDLINECONSOLES];
|
||||
|
||||
static int preferred_console = -1;
|
||||
static bool has_preferred_console;
|
||||
int console_set_on_cmdline;
|
||||
EXPORT_SYMBOL(console_set_on_cmdline);
|
||||
|
||||
|
@ -2861,7 +2860,8 @@ early_param("keep_bootcon", keep_bootcon_setup);
|
|||
* Care need to be taken with consoles that are statically
|
||||
* enabled such as netconsole
|
||||
*/
|
||||
static int try_enable_new_console(struct console *newcon, bool user_specified)
|
||||
static int try_enable_preferred_console(struct console *newcon,
|
||||
bool user_specified)
|
||||
{
|
||||
struct console_cmdline *c;
|
||||
int i, err;
|
||||
|
@ -2891,10 +2891,8 @@ static int try_enable_new_console(struct console *newcon, bool user_specified)
|
|||
return err;
|
||||
}
|
||||
newcon->flags |= CON_ENABLED;
|
||||
if (i == preferred_console) {
|
||||
if (i == preferred_console)
|
||||
newcon->flags |= CON_CONSDEV;
|
||||
has_preferred_console = true;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
@ -2909,6 +2907,21 @@ static int try_enable_new_console(struct console *newcon, bool user_specified)
|
|||
return -ENOENT;
|
||||
}
|
||||
|
||||
/* Try to enable the console unconditionally */
|
||||
static void try_enable_default_console(struct console *newcon)
|
||||
{
|
||||
if (newcon->index < 0)
|
||||
newcon->index = 0;
|
||||
|
||||
if (newcon->setup && newcon->setup(newcon, NULL) != 0)
|
||||
return;
|
||||
|
||||
newcon->flags |= CON_ENABLED;
|
||||
|
||||
if (newcon->device)
|
||||
newcon->flags |= CON_CONSDEV;
|
||||
}
|
||||
|
||||
/*
|
||||
* The console driver calls this routine during kernel initialization
|
||||
* to register the console printing procedure with printk() and to
|
||||
|
@ -2930,59 +2943,56 @@ static int try_enable_new_console(struct console *newcon, bool user_specified)
|
|||
*/
|
||||
void register_console(struct console *newcon)
|
||||
{
|
||||
struct console *bcon = NULL;
|
||||
struct console *con;
|
||||
bool bootcon_enabled = false;
|
||||
bool realcon_enabled = false;
|
||||
int err;
|
||||
|
||||
for_each_console(bcon) {
|
||||
if (WARN(bcon == newcon, "console '%s%d' already registered\n",
|
||||
bcon->name, bcon->index))
|
||||
for_each_console(con) {
|
||||
if (WARN(con == newcon, "console '%s%d' already registered\n",
|
||||
con->name, con->index))
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* before we register a new CON_BOOT console, make sure we don't
|
||||
* already have a valid console
|
||||
*/
|
||||
if (newcon->flags & CON_BOOT) {
|
||||
for_each_console(bcon) {
|
||||
if (!(bcon->flags & CON_BOOT)) {
|
||||
pr_info("Too late to register bootconsole %s%d\n",
|
||||
newcon->name, newcon->index);
|
||||
return;
|
||||
}
|
||||
}
|
||||
for_each_console(con) {
|
||||
if (con->flags & CON_BOOT)
|
||||
bootcon_enabled = true;
|
||||
else
|
||||
realcon_enabled = true;
|
||||
}
|
||||
|
||||
if (console_drivers && console_drivers->flags & CON_BOOT)
|
||||
bcon = console_drivers;
|
||||
|
||||
if (!has_preferred_console || bcon || !console_drivers)
|
||||
has_preferred_console = preferred_console >= 0;
|
||||
/* Do not register boot consoles when there already is a real one. */
|
||||
if (newcon->flags & CON_BOOT && realcon_enabled) {
|
||||
pr_info("Too late to register bootconsole %s%d\n",
|
||||
newcon->name, newcon->index);
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* See if we want to use this console driver. If we
|
||||
* didn't select a console we take the first one
|
||||
* that registers here.
|
||||
* See if we want to enable this console driver by default.
|
||||
*
|
||||
* Nope when a console is preferred by the command line, device
|
||||
* tree, or SPCR.
|
||||
*
|
||||
* The first real console with tty binding (driver) wins. More
|
||||
* consoles might get enabled before the right one is found.
|
||||
*
|
||||
* Note that a console with tty binding will have CON_CONSDEV
|
||||
* flag set and will be first in the list.
|
||||
*/
|
||||
if (!has_preferred_console) {
|
||||
if (newcon->index < 0)
|
||||
newcon->index = 0;
|
||||
if (newcon->setup == NULL ||
|
||||
newcon->setup(newcon, NULL) == 0) {
|
||||
newcon->flags |= CON_ENABLED;
|
||||
if (newcon->device) {
|
||||
newcon->flags |= CON_CONSDEV;
|
||||
has_preferred_console = true;
|
||||
}
|
||||
if (preferred_console < 0) {
|
||||
if (!console_drivers || !console_drivers->device ||
|
||||
console_drivers->flags & CON_BOOT) {
|
||||
try_enable_default_console(newcon);
|
||||
}
|
||||
}
|
||||
|
||||
/* See if this console matches one we selected on the command line */
|
||||
err = try_enable_new_console(newcon, true);
|
||||
err = try_enable_preferred_console(newcon, true);
|
||||
|
||||
/* If not, try to match against the platform default(s) */
|
||||
if (err == -ENOENT)
|
||||
err = try_enable_new_console(newcon, false);
|
||||
err = try_enable_preferred_console(newcon, false);
|
||||
|
||||
/* printk() messages are not printed to the Braille console. */
|
||||
if (err || newcon->flags & CON_BRL)
|
||||
|
@ -2994,8 +3004,10 @@ void register_console(struct console *newcon)
|
|||
* the real console are the same physical device, it's annoying to
|
||||
* see the beginning boot messages twice
|
||||
*/
|
||||
if (bcon && ((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV))
|
||||
if (bootcon_enabled &&
|
||||
((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV)) {
|
||||
newcon->flags &= ~CON_PRINTBUFFER;
|
||||
}
|
||||
|
||||
/*
|
||||
* Put this console in the list - keep the
|
||||
|
@ -3051,15 +3063,15 @@ void register_console(struct console *newcon)
|
|||
pr_info("%sconsole [%s%d] enabled\n",
|
||||
(newcon->flags & CON_BOOT) ? "boot" : "" ,
|
||||
newcon->name, newcon->index);
|
||||
if (bcon &&
|
||||
if (bootcon_enabled &&
|
||||
((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV) &&
|
||||
!keep_bootcon) {
|
||||
/* We need to iterate through all boot consoles, to make
|
||||
* sure we print everything out, before we unregister them.
|
||||
*/
|
||||
for_each_console(bcon)
|
||||
if (bcon->flags & CON_BOOT)
|
||||
unregister_console(bcon);
|
||||
for_each_console(con)
|
||||
if (con->flags & CON_BOOT)
|
||||
unregister_console(con);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(register_console);
|
||||
|
|
Loading…
Add table
Reference in a new issue