Revert "pktcdvd: push BKL down into driver"
This reverts commit 5b6155ee70e9c4d2ad7e6f514c8eee06e2711c3a, because
the block device ioctl's really aren't ready for it.
In particular, the "struct file *" and the "struct inode *" arguments do
not necessarily match, which means that the unlocked version of the
ioctl (that only gets a "struct file *") isn't actually able to handle
the cases it needs to handle.
This fixes bugzilla
http://bugzilla.kernel.org/show_bug.cgi?id=11401
Reported-and-bisected-by: Laurent Riffard <laurent.riffard@free.fr>
Acked-by: Peter Osterlund <petero2@telia.com>
Cc: Alan Cox <alan@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 158eed4..29b7a64 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -49,7 +49,6 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
-#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/file.h>
@@ -2798,14 +2797,9 @@
return ret;
}
-static long pkt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+static int pkt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
- struct inode *inode = file->f_path.dentry->d_inode;
- struct pktcdvd_device *pd;
- long ret;
-
- lock_kernel();
- pd = inode->i_bdev->bd_disk->private_data;
+ struct pktcdvd_device *pd = inode->i_bdev->bd_disk->private_data;
VPRINTK("pkt_ioctl: cmd %x, dev %d:%d\n", cmd, imajor(inode), iminor(inode));
@@ -2818,8 +2812,7 @@
case CDROM_LAST_WRITTEN:
case CDROM_SEND_PACKET:
case SCSI_IOCTL_SEND_COMMAND:
- ret = blkdev_ioctl(pd->bdev->bd_inode, file, cmd, arg);
- break;
+ return blkdev_ioctl(pd->bdev->bd_inode, file, cmd, arg);
case CDROMEJECT:
/*
@@ -2828,15 +2821,14 @@
*/
if (pd->refcnt == 1)
pkt_lock_door(pd, 0);
- ret = blkdev_ioctl(pd->bdev->bd_inode, file, cmd, arg);
- break;
+ return blkdev_ioctl(pd->bdev->bd_inode, file, cmd, arg);
default:
VPRINTK(DRIVER_NAME": Unknown ioctl for %s (%x)\n", pd->name, cmd);
- ret = -ENOTTY;
+ return -ENOTTY;
}
- unlock_kernel();
- return ret;
+
+ return 0;
}
static int pkt_media_changed(struct gendisk *disk)
@@ -2858,7 +2850,7 @@
.owner = THIS_MODULE,
.open = pkt_open,
.release = pkt_close,
- .unlocked_ioctl = pkt_ioctl,
+ .ioctl = pkt_ioctl,
.media_changed = pkt_media_changed,
};
@@ -3023,8 +3015,7 @@
mutex_unlock(&ctl_mutex);
}
-static long pkt_ctl_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
+static int pkt_ctl_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
struct pkt_ctrl_command ctrl_cmd;
@@ -3041,22 +3032,16 @@
case PKT_CTRL_CMD_SETUP:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- lock_kernel();
ret = pkt_setup_dev(new_decode_dev(ctrl_cmd.dev), &pkt_dev);
ctrl_cmd.pkt_dev = new_encode_dev(pkt_dev);
- unlock_kernel();
break;
case PKT_CTRL_CMD_TEARDOWN:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- lock_kernel();
ret = pkt_remove_dev(new_decode_dev(ctrl_cmd.pkt_dev));
- unlock_kernel();
break;
case PKT_CTRL_CMD_STATUS:
- lock_kernel();
pkt_get_status(&ctrl_cmd);
- unlock_kernel();
break;
default:
return -ENOTTY;
@@ -3069,7 +3054,7 @@
static const struct file_operations pkt_ctl_fops = {
- .unlocked_ioctl = pkt_ctl_ioctl,
+ .ioctl = pkt_ctl_ioctl,
.owner = THIS_MODULE,
};