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authorJonathan Corbet <corbet@lwn.net>2008-05-18 15:32:43 -0600
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:53 -0600
commitf2b9857eee17797541b845782ade4d7a9d50f843 (patch)
tree914a00afee2ff953199f99f7cf869e3fd83b36bd /drivers/scsi/3w-9xxx.c
parent0b2806768899dba5967bcd4a3b93eaed9a1dc4f3 (diff)
downloadop-kernel-dev-f2b9857eee17797541b845782ade4d7a9d50f843.zip
op-kernel-dev-f2b9857eee17797541b845782ade4d7a9d50f843.tar.gz
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-9xxx.c')
-rw-r--r--drivers/scsi/3w-9xxx.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 2239d16..eaa805d 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -84,6 +84,7 @@
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/mutex.h>
+#include <linux/smp_lock.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
@@ -862,13 +863,13 @@ out:
} /* End twa_chrdev_ioctl() */
/* This function handles open for the character device */
-/* NOTE that this function will race with remove; adding BKL
- will not help. */
+/* NOTE that this function will race with remove. */
static int twa_chrdev_open(struct inode *inode, struct file *file)
{
unsigned int minor_number;
int retval = TW_IOCTL_ERROR_OS_ENODEV;
+ cycle_kernel_lock();
minor_number = iminor(inode);
if (minor_number >= twa_device_extension_count)
goto out;
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