drivers/s390: cdev lock_kernel() pushdown
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index 83ae9a8..6154998 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -9,6 +9,7 @@
*/
#include <linux/cdev.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/cio.h>
@@ -668,7 +669,7 @@
if (accmode == O_RDWR)
return -EACCES;
-
+ lock_kernel();
/*
* We treat the minor number as the devno of the ur device
* to find in the driver tree.
@@ -676,8 +677,10 @@
devno = MINOR(file->f_dentry->d_inode->i_rdev);
urd = urdev_get_from_devno(devno);
- if (!urd)
- return -ENXIO;
+ if (!urd) {
+ rc = -ENXIO;
+ goto out;
+ }
spin_lock(&urd->open_lock);
while (urd->open_flag) {
@@ -720,6 +723,7 @@
goto fail_urfile_free;
urf->file_reclen = rc;
file->private_data = urf;
+ unlock_kernel();
return 0;
fail_urfile_free:
@@ -730,6 +734,8 @@
spin_unlock(&urd->open_lock);
fail_put:
urdev_put(urd);
+out:
+ unlock_kernel();
return rc;
}