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| author | Arnd Bergmann <arnd@arndb.de> | 2010-07-08 14:57:03 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-08-07 18:26:29 +0200 |
| commit | 2daa672b1a736d41b3e7a2e3a05f1909a1f96530 (patch) | |
| tree | 17a9b1f945307192e6cb9dec78472e39da32e727 | |
| parent | 409f3499a2cfcd1e9c2857c53af7fcce069f027f (diff) | |
| download | kernel-common-2daa672b1a736d41b3e7a2e3a05f1909a1f96530.tar.gz kernel-common-2daa672b1a736d41b3e7a2e3a05f1909a1f96530.tar.bz2 kernel-common-2daa672b1a736d41b3e7a2e3a05f1909a1f96530.zip | |
scsi/i2o: restore ioctl changes
This restores the changes from "scsi/i2o_block: cleanup ioctl
handling", which accidentally got reverted.
Origignal changelog:
This fixes the ioctl function of the i2o_block driver, which
has multiple problems:
* The BLKI2OSRSTRAT and BLKI2OSWSTRAT commands always return
-ENOTTY on success, where they should return 0.
* Support for 32 bit compat is missing
* The driver should use the .ioctl function and because
.locked_ioctl is going away.
The use of the big kernel lock remains for now, but gets
made explictit in the ioctl function.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
| -rw-r--r-- | drivers/message/i2o/i2o_block.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c index a5bc3ee0d93e..e6733bc99724 100644 --- a/drivers/message/i2o/i2o_block.c +++ b/drivers/message/i2o/i2o_block.c @@ -657,30 +657,40 @@ static int i2o_block_ioctl(struct block_device *bdev, fmode_t mode, { struct gendisk *disk = bdev->bd_disk; struct i2o_block_device *dev = disk->private_data; + int ret = -ENOTTY; /* Anyone capable of this syscall can do *real bad* things */ if (!capable(CAP_SYS_ADMIN)) return -EPERM; + lock_kernel(); switch (cmd) { case BLKI2OGRSTRAT: - return put_user(dev->rcache, (int __user *)arg); + ret = put_user(dev->rcache, (int __user *)arg); + break; case BLKI2OGWSTRAT: - return put_user(dev->wcache, (int __user *)arg); + ret = put_user(dev->wcache, (int __user *)arg); + break; case BLKI2OSRSTRAT: + ret = -EINVAL; if (arg < 0 || arg > CACHE_SMARTFETCH) - return -EINVAL; + break; dev->rcache = arg; + ret = 0; break; case BLKI2OSWSTRAT: + ret = -EINVAL; if (arg != 0 && (arg < CACHE_WRITETHROUGH || arg > CACHE_SMARTBACK)) - return -EINVAL; + break; dev->wcache = arg; + ret = 0; break; } - return -ENOTTY; + unlock_kernel(); + + return ret; }; /** @@ -936,6 +946,7 @@ static const struct block_device_operations i2o_block_fops = { .open = i2o_block_open, .release = i2o_block_release, .ioctl = i2o_block_ioctl, + .compat_ioctl = i2o_block_ioctl, .getgeo = i2o_block_getgeo, .media_changed = i2o_block_media_changed }; |