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infiniband: more BKL pushdown

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Be extra-cautious and protect the remaining open() functions.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet
2008-05-16 14:01:12 -06:00
parent 65f37b790b
commit 057e7c7ff9
2 changed files with 13 additions and 3 deletions
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7
drivers/infiniband/core/user_mad.c
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@@ -47,6 +47,7 @@
#include <linux/kref.h>
#include <linux/compat.h>
#include <linux/semaphore.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
@@ -783,14 +784,17 @@ static int ib_umad_open(struct inode *inode, struct file *filp)
struct ib_umad_file *file;
int ret = 0;
lock_kernel();
spin_lock(&port_lock);
port = umad_port[iminor(inode) - IB_UMAD_MINOR_BASE];
if (port)
kref_get(&port->umad_dev->ref);
spin_unlock(&port_lock);
if (!port)
if (!port) {
unlock_kernel();
return -ENXIO;
}
mutex_lock(&port->file_mutex);
@@ -819,6 +823,7 @@ static int ib_umad_open(struct inode *inode, struct file *filp)
out:
mutex_unlock(&port->file_mutex);
unlock_kernel();
return ret;
}