luck/tmp_suning_uos_patched
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Revert "pktcdvd: push BKL down into driver"

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This reverts commit 5b6155ee70, 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>
This commit is contained in:
Linus Torvalds 2008-08-27 13:35:31 -07:00
parent 1941246dd9
commit 8560c650f3
1 changed files with 10 additions and 25 deletions
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35
drivers/block/pktcdvd.c
View File

@ -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 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
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 @@ static long pkt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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 @@ static long pkt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
*/
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 @@ static struct block_device_operations pktcdvd_ops = {
.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 @@ static void pkt_get_status(struct pkt_ctrl_command *ctrl_cmd)
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 @@ static long pkt_ctl_ioctl(struct file *file, unsigned int cmd,
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 long pkt_ctl_ioctl(struct file *file, unsigned int cmd,
static const struct file_operations pkt_ctl_fops = {
.unlocked_ioctl = pkt_ctl_ioctl,
.ioctl = pkt_ctl_ioctl,
.owner = THIS_MODULE,
};