msm: camera: Fix camera crash when ctrl_q is empty
Add proper error condition if the list is empty and
return error value to upper layers instead of BUG_ON.
Change-Id: I89237e7a27d5fb1e1fd5f1a8a2dfd7ea9a1afff5
CRs-Fixed: 481759
Signed-off-by:
Suresh Vankadara <svankada@codeaurora.org>
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