tree 0f70562d0f51c086b02953388578bd87040b5067
parent 0f3d9a17469d71ba1bab79c07c8eecb9e26e60af
author Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> 1274954283 +0900
committer Michael S. Tsirkin <mst@redhat.com> 1274957699 +0300

vhost: fix to check the return value of copy_to/from_user() correctly

copy_to/from_user() returns the number of bytes that could not be copied.

So we need to check if it is not zero, and in that case, we should return
the error number -EFAULT rather than directly return the return value from
copy_to/from_user().

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>