diff options
Diffstat (limited to 'drivers/s390/char/vmur.c')
| -rw-r--r-- | drivers/s390/char/vmur.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c index 83ae9a852f00..61549987ed70 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 @@ static int ur_open(struct inode *inode, struct file *file) 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 @@ static int ur_open(struct inode *inode, struct file *file) 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 @@ static int ur_open(struct inode *inode, struct file *file) goto fail_urfile_free; urf->file_reclen = rc; file->private_data = urf; + unlock_kernel(); return 0; fail_urfile_free: @@ -730,6 +734,8 @@ fail_unlock: spin_unlock(&urd->open_lock); fail_put: urdev_put(urd); +out: + unlock_kernel(); return rc; } |