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drivers/s390: cdev lock_kernel() pushdown

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Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet
2008-05-15 10:01:17 -06:00
parent 51a776fa7a
commit 764a4a8e54
4 changed files with 41 additions and 14 deletions
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12
drivers/s390/char/tape_char.c
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@@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/mtio.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
@@ -289,21 +290,26 @@ tapechar_open (struct inode *inode, struct file *filp)
if (imajor(filp->f_path.dentry->d_inode) != tapechar_major)
return -ENODEV;
lock_kernel();
minor = iminor(filp->f_path.dentry->d_inode);
device = tape_get_device(minor / TAPE_MINORS_PER_DEV);
if (IS_ERR(device)) {
DBF_EVENT(3, "TCHAR:open: tape_get_device() failed\n");
return PTR_ERR(device);
rc = PTR_ERR(device);
goto out;
}
rc = tape_open(device);
if (rc == 0) {
filp->private_data = device;
return nonseekable_open(inode, filp);
rc = nonseekable_open(inode, filp);
}
tape_put_device(device);
else
tape_put_device(device);
out:
unlock_kernel();
return rc;
}