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Return the result from user admin command IOCTL even in case of failure 

We copy the result to user if the command is completed from the
controller even if it completes with failure (non-zero) status.
A return status of < 0 indicates the command was not completed
by the controller. The user application may expect the error code
in the result field in case of failure.

Signed-off-by: Chayan Biswas <Chayan.Biswas@sandisk.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Chayan Biswas 2013-05-22 22:34:49 +00:00 committed by Matthew Wilcox
parent 053ab702cc
commit cf90bc4830
1 changed files with 1 additions and 1 deletions
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2
drivers/block/nvme-core.c
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@ -1439,7 +1439,7 @@ static int nvme_user_admin_cmd(struct nvme_dev *dev,
nvme_free_iod(dev, iod);
}
if (!status && copy_to_user(&ucmd->result, &cmd.result,
if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result,
sizeof(cmd.result)))
status = -EFAULT;