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IB/hfi1: Prevent context loss

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If a context has already been assigned to an FD, prevent
another assignment.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Ira Weiny 2016-06-09 07:51:33 -07:00 committed by Doug Ledford
parent c3c64a951c
commit ca2f30a0a6
1 changed files with 3 additions and 0 deletions
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3
drivers/infiniband/hw/hfi1/file_ops.c
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@ -203,6 +203,9 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
switch (cmd) {
case HFI1_IOCTL_ASSIGN_CTXT:
if (uctxt)
return -EINVAL;
if (copy_from_user(&uinfo,
(struct hfi1_user_info __user *)arg,
sizeof(uinfo)))