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IB/qib: 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 07:51:39 -07:00 committed by Doug Ledford
parent ca2f30a0a6
commit 5e9ef24619
1 changed files with 5 additions and 0 deletions
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5
drivers/infiniband/hw/qib/qib_file_ops.c
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@ -2178,6 +2178,11 @@ static ssize_t qib_write(struct file *fp, const char __user *data,
switch (cmd.type) { switch (cmd.type) {
case QIB_CMD_ASSIGN_CTXT: case QIB_CMD_ASSIGN_CTXT:
if (rcd) {
ret = -EINVAL;
goto bail;
}
ret = qib_assign_ctxt(fp, &cmd.cmd.user_info); ret = qib_assign_ctxt(fp, &cmd.cmd.user_info);
if (ret) if (ret)
goto bail; goto bail;