drivers: Push down BKL into various drivers

These are the last remaining device drivers using
the ->ioctl file operation in the drivers directory
(except from v4l drivers).

[fweisbec: drop i8k pushdown as it has been done from
procfs pushdown branch already]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/char/apm-emulation.c b/drivers/char/apm-emulation.c
index 4f568cb9af3f..033e1505fca9 100644
--- a/drivers/char/apm-emulation.c
+++ b/drivers/char/apm-emulation.c
@@ -265,8 +265,8 @@ static unsigned int apm_poll(struct file *fp, poll_table * wait)
  *   Only when everyone who has opened /dev/apm_bios with write permission
  *   has acknowledge does the actual suspend happen.
  */
-static int
-apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
+static long
+apm_ioctl(struct file *filp, u_int cmd, u_long arg)
 {
         struct apm_user *as = filp->private_data;
         int err = -EINVAL;
@@ -274,6 +274,7 @@ apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
         if (!as->suser || !as->writer)
                 return -EPERM;
 
+        lock_kernel();
         switch (cmd) {
         case APM_IOC_SUSPEND:
                 mutex_lock(&state_lock);
@@ -334,6 +335,7 @@ apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
                 mutex_unlock(&state_lock);
                 break;
         }
+        unlock_kernel();
 
         return err;
 }
@@ -397,7 +399,7 @@ static const struct file_operations apm_bios_fops = {
         .owner          = THIS_MODULE,
         .read           = apm_read,
         .poll           = apm_poll,
-        .ioctl          = apm_ioctl,
+        .unlocked_ioctl = apm_ioctl,
         .open           = apm_open,
         .release        = apm_release,
 };