infiniband/qedr: Potential null ptr dereference of qp
idr_find() may fail and return a NULL pointer. The fix checks the return value of the function and returns an error in case of NULL. Signed-off-by: NAditya Pakki <pakki001@umn.edu> Acked-by: NMichal Kalderon <michal.kalderon@marvell.com> Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
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