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>

diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index abf805e332e2a11e55e628c0f2e419e782ba03a9..27833e4dae2adffca5eec7714272459cd0a29bb7 100644 (file)
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -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: