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[PATCH] vt: Honor the return value of device_create_file 

Check the return value of device_create_file().  If return is 'fail', remove
attributes by calling device_remove_file().

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Antonino A. Daplas 2006-10-03 01:14:49 -07:00 committed by Linus Torvalds
parent 212f26398f
commit 928e964f26
1 changed files with 24 additions and 7 deletions
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31
drivers/char/vt.c
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@ -106,7 +106,8 @@
#define MAX_NR_CON_DRIVER 16 #define MAX_NR_CON_DRIVER 16
#define CON_DRIVER_FLAG_MODULE 1 #define CON_DRIVER_FLAG_MODULE 1
#define CON_DRIVER_FLAG_INIT 2 #define CON_DRIVER_FLAG_INIT 2
#define CON_DRIVER_FLAG_ATTR 4
struct con_driver { struct con_driver {
const struct consw *con; const struct consw *con;
@ -3070,22 +3071,37 @@ static struct class_device_attribute class_device_attrs[] = {
static int vtconsole_init_class_device(struct con_driver *con) static int vtconsole_init_class_device(struct con_driver *con)
{ {
int i; int i;
int error = 0;
con->flag |= CON_DRIVER_FLAG_ATTR;
class_set_devdata(con->class_dev, con); class_set_devdata(con->class_dev, con);
for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
class_device_create_file(con->class_dev, error = class_device_create_file(con->class_dev,
&class_device_attrs[i]); &class_device_attrs[i]);
if (error)
break;
}
return 0; if (error) {
while (--i >= 0)
class_device_remove_file(con->class_dev,
&class_device_attrs[i]);
con->flag &= ~CON_DRIVER_FLAG_ATTR;
}
return error;
} }
static void vtconsole_deinit_class_device(struct con_driver *con) static void vtconsole_deinit_class_device(struct con_driver *con)
{ {
int i; int i;
for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) if (con->flag & CON_DRIVER_FLAG_ATTR) {
class_device_remove_file(con->class_dev, for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
&class_device_attrs[i]); class_device_remove_file(con->class_dev,
&class_device_attrs[i]);
con->flag &= ~CON_DRIVER_FLAG_ATTR;
}
} }
/** /**
@ -3184,6 +3200,7 @@ int register_con_driver(const struct consw *csw, int first, int last)
} else { } else {
vtconsole_init_class_device(con_driver); vtconsole_init_class_device(con_driver);
} }
err: err:
release_console_sem(); release_console_sem();
module_put(owner); module_put(owner);