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authorLinus Torvalds <torvalds@linux-foundation.org>2008-07-14 14:48:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-14 14:48:31 -0700
commitd1794f2c5b5817eb79ccc5e00701ca748d1b073a (patch)
tree5a4c98e694e88a8c82f342d0cc9edb2a4cbbef36 /drivers/s390/char/vmur.c
parenta41eebab7537890409ea9dfe0fcda9b5fbdb090d (diff)
parent2fceef397f9880b212a74c418290ce69e7ac00eb (diff)
Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6
* 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits) IB/umad: BKL is not needed for ib_umad_open() IB/uverbs: BKL is not needed for ib_uverbs_open() bf561-coreb: BKL unneeded for open() Call fasync() functions without the BKL snd/PCM: fasync BKL pushdown ipmi: fasync BKL pushdown ecryptfs: fasync BKL pushdown Bluetooth VHCI: fasync BKL pushdown tty_io: fasync BKL pushdown tun: fasync BKL pushdown i2o: fasync BKL pushdown mpt: fasync BKL pushdown Remove BKL from remote_llseek v2 Make FAT users happier by not deadlocking x86-mce: BKL pushdown vmwatchdog: BKL pushdown vmcp: BKL pushdown via-pmu: BKL pushdown uml-random: BKL pushdown uml-mmapper: BKL pushdown ...
Diffstat (limited to 'drivers/s390/char/vmur.c')
-rw-r--r--drivers/s390/char/vmur.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index 49cba9effe89..0a9f1cccbe58 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>
@@ -669,7 +670,7 @@ 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.
@@ -677,8 +678,10 @@ 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) {
@@ -721,6 +724,7 @@ 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:
@@ -731,6 +735,8 @@ fail_unlock:
spin_unlock(&urd->open_lock);
fail_put:
urdev_put(urd);
+out:
+ unlock_kernel();
return rc;
}