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path: root/drivers/s390/char/tape_char.c
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Diffstat (limited to 'drivers/s390/char/tape_char.c')
-rw-r--r--drivers/s390/char/tape_char.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/s390/char/tape_char.c b/drivers/s390/char/tape_char.c
index 86262a13f7c..5ce7ca38ace 100644
--- a/drivers/s390/char/tape_char.c
+++ b/drivers/s390/char/tape_char.c
@@ -37,6 +37,8 @@ static int tapechar_open(struct inode *,struct file *);
static int tapechar_release(struct inode *,struct file *);
static int tapechar_ioctl(struct inode *, struct file *, unsigned int,
unsigned long);
+static long tapechar_compat_ioctl(struct file *, unsigned int,
+ unsigned long);
static struct file_operations tape_fops =
{
@@ -44,6 +46,7 @@ static struct file_operations tape_fops =
.read = tapechar_read,
.write = tapechar_write,
.ioctl = tapechar_ioctl,
+ .compat_ioctl = tapechar_compat_ioctl,
.open = tapechar_open,
.release = tapechar_release,
};
@@ -463,6 +466,23 @@ tapechar_ioctl(struct inode *inp, struct file *filp,
return device->discipline->ioctl_fn(device, no, data);
}
+static long
+tapechar_compat_ioctl(struct file *filp, unsigned int no, unsigned long data)
+{
+ struct tape_device *device = filp->private_data;
+ int rval = -ENOIOCTLCMD;
+
+ if (device->discipline->ioctl_fn) {
+ lock_kernel();
+ rval = device->discipline->ioctl_fn(device, no, data);
+ unlock_kernel();
+ if (rval == -EINVAL)
+ rval = -ENOIOCTLCMD;
+ }
+
+ return rval;
+}
+
/*
* Initialize character device frontend.
*/