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skd: implement trivial scsi ioctls directly 

This way there is no need to drag in a dependency on the
BLOCK_PC code, which is going to become optional.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2017-01-28 09:32:50 +01:00 committed by Jens Axboe
parent 1a7347c7db
commit 3719fa8622
1 changed files with 11 additions and 4 deletions
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15
drivers/block/skd_main.c
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@ -1204,10 +1204,11 @@ static void skd_complete_special(struct skd_device *skdev,
static int skd_bdev_ioctl(struct block_device *bdev, fmode_t mode,
uint cmd_in, ulong arg)
{
int rc = 0;
static const int sg_version_num = 30527;
int rc = 0, timeout;
struct gendisk *disk = bdev->bd_disk;
struct skd_device *skdev = disk->private_data;
void __user *p = (void *)arg;
int __user *p = (int __user *)arg;
pr_debug("%s:%s:%d %s: CMD[%s] ioctl mode 0x%x, cmd 0x%x arg %0lx\n",
skdev->name, __func__, __LINE__,
@ -1218,12 +1219,18 @@ static int skd_bdev_ioctl(struct block_device *bdev, fmode_t mode,
switch (cmd_in) {
case SG_SET_TIMEOUT:
rc = get_user(timeout, p);
if (!rc)
disk->queue->sg_timeout = clock_t_to_jiffies(timeout);
break;
case SG_GET_TIMEOUT:
rc = jiffies_to_clock_t(disk->queue->sg_timeout);
break;
case SG_GET_VERSION_NUM:
rc = scsi_cmd_ioctl(disk->queue, disk, mode, cmd_in, p);
rc = put_user(sg_version_num, p);
break;
case SG_IO:
rc = skd_ioctl_sg_io(skdev, mode, p);
rc = skd_ioctl_sg_io(skdev, mode, (void __user *)arg);
break;
default: