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authorJonathan Corbet <corbet@lwn.net>2008-05-19 01:32:43 +0400
committerJonathan Corbet <corbet@lwn.net>2008-06-21 00:05:53 +0400
commitf2b9857eee17797541b845782ade4d7a9d50f843 (patch)
tree914a00afee2ff953199f99f7cf869e3fd83b36bd /drivers/scsi/3w-xxxx.c
parent0b2806768899dba5967bcd4a3b93eaed9a1dc4f3 (diff)
downloadlinux-f2b9857eee17797541b845782ade4d7a9d50f843.tar.xz
Add a bunch of cycle_kernel_lock() calls
All of the open() functions which don't need the BKL on their face may still depend on its acquisition to serialize opens against driver initialization. So make those functions acquire then release the BKL to be on the safe side. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/scsi/3w-xxxx.c')
-rw-r--r--drivers/scsi/3w-xxxx.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index bbff029536ea..a0537f09aa21 100644
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -198,6 +198,7 @@
#include <linux/module.h>
#include <linux/reboot.h>
+#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
@@ -1027,12 +1028,12 @@ out:
} /* End tw_chrdev_ioctl() */
/* This function handles open for the character device */
-/* NOTE that this function races with remove - adding BKL
- won't help */
+/* NOTE that this function races with remove. */
static int tw_chrdev_open(struct inode *inode, struct file *file)
{
unsigned int minor_number;
+ cycle_kernel_lock();
dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
minor_number = iminor(inode);