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PCIe deinit function tegra_pcie_dma_deinit() takes cookie double pointer as argument. Add null check for pointer stored in double pointer variable to avoid crash in tegra_pcie_dma_deinit(). Bug 4712065 Change-Id: Ib272058f558738c7e6b5a20c6f2ba85c2bf2a781 Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-t264/+/3163949 Reviewed-by: Bibek Basu <bbasu@nvidia.com> GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com> Reviewed-by: Nagarjuna Kristam <nkristam@nvidia.com>