pci/pcie/aer/aerdrv_acpi.c: inconsequent NULL checking

[Adrian Bunk]

The Coverity checker spotted the following inconsequent NULL checking 
introduced by commit 3c75e23784e6ed5f4841de43d0750fd9b37bafcb:

<--  snip  -->

...
int aer_osc_setup(struct pcie_device *pciedev)
{
...            vvvvvvvvv
        while (pdev->bus && pdev->bus->self)
                pdev = pdev->bus->self;
        handle = acpi_get_pci_rootbridge_handle(
                pci_domain_nr(pdev->bus), pdev->bus->number);
...                                       ^^^^^^^^^^^^^^^^^

<--  snip  -->

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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