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path: root/drivers/media/video/dabusb.c
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Diffstat (limited to 'drivers/media/video/dabusb.c')
-rw-r--r--drivers/media/video/dabusb.c18
1 files changed, 3 insertions, 15 deletions
diff --git a/drivers/media/video/dabusb.c b/drivers/media/video/dabusb.c
index 5b176bd7afd..f3e25e91366 100644
--- a/drivers/media/video/dabusb.c
+++ b/drivers/media/video/dabusb.c
@@ -32,7 +32,6 @@
#include <linux/list.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
@@ -621,7 +620,6 @@ static int dabusb_open (struct inode *inode, struct file *file)
if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB))
return -EIO;
- lock_kernel();
s = &dabusb[devnum - DABUSB_MINOR];
dbg("dabusb_open");
@@ -630,21 +628,17 @@ static int dabusb_open (struct inode *inode, struct file *file)
while (!s->usbdev || s->opened) {
mutex_unlock(&s->mutex);
- if (file->f_flags & O_NONBLOCK) {
+ if (file->f_flags & O_NONBLOCK)
return -EBUSY;
- }
msleep_interruptible(500);
- if (signal_pending (current)) {
- unlock_kernel();
+ if (signal_pending (current))
return -EAGAIN;
- }
mutex_lock(&s->mutex);
}
if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
mutex_unlock(&s->mutex);
dev_err(&s->usbdev->dev, "set_interface failed\n");
- unlock_kernel();
return -EINVAL;
}
s->opened = 1;
@@ -654,7 +648,6 @@ static int dabusb_open (struct inode *inode, struct file *file)
file->private_data = s;
r = nonseekable_open(inode, file);
- unlock_kernel();
return r;
}
@@ -689,17 +682,13 @@ static long dabusb_ioctl (struct file *file, unsigned int cmd, unsigned long arg
dbg("dabusb_ioctl");
- lock_kernel();
- if (s->remove_pending) {
- unlock_kernel();
+ if (s->remove_pending)
return -EIO;
- }
mutex_lock(&s->mutex);
if (!s->usbdev) {
mutex_unlock(&s->mutex);
- unlock_kernel();
return -EIO;
}
@@ -735,7 +724,6 @@ static long dabusb_ioctl (struct file *file, unsigned int cmd, unsigned long arg
break;
}
mutex_unlock(&s->mutex);
- unlock_kernel();
return ret;
}