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authorJonathan Corbet <corbet@lwn.net>2008-05-16 14:23:31 -0600
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:53 -0600
commit1af46fd72d6c18c1d96ce7f3491b841055e9dcfd (patch)
treea6950a48e99ee1bc65b9bc5d45443aba7ec4e79c /drivers/usb/mon/mon_bin.c
parentb2f2ba01b2a4356e92231669f7e3dcee37ac2fca (diff)
USB Monitor: BKL pushdown
Add explicit lock_kernel() calls to mon_bin_open() Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/usb/mon/mon_bin.c')
-rw-r--r--drivers/usb/mon/mon_bin.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c
index 49145534e06..293a46247c3 100644
--- a/drivers/usb/mon/mon_bin.c
+++ b/drivers/usb/mon/mon_bin.c
@@ -15,6 +15,7 @@
#include <linux/poll.h>
#include <linux/compat.h>
#include <linux/mm.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
@@ -527,14 +528,17 @@ static int mon_bin_open(struct inode *inode, struct file *file)
size_t size;
int rc;
+ lock_kernel();
mutex_lock(&mon_lock);
if ((mbus = mon_bus_lookup(iminor(inode))) == NULL) {
mutex_unlock(&mon_lock);
+ unlock_kernel();
return -ENODEV;
}
if (mbus != &mon_bus0 && mbus->u_bus == NULL) {
printk(KERN_ERR TAG ": consistency error on open\n");
mutex_unlock(&mon_lock);
+ unlock_kernel();
return -ENODEV;
}
@@ -568,6 +572,7 @@ static int mon_bin_open(struct inode *inode, struct file *file)
file->private_data = rp;
mutex_unlock(&mon_lock);
+ unlock_kernel();
return 0;
err_allocbuff:
@@ -576,6 +581,7 @@ err_allocvec:
kfree(rp);
err_alloc:
mutex_unlock(&mon_lock);
+ unlock_kernel();
return rc;
}