If msi_setup_entry() fails to allocate an affinity mask, it logs a message
but continues on and allocates an MSI entry with entry->affinity == NULL.
Check for this case in pci_irq_get_affinity() so we don't try to
dereference a NULL pointer.
[bhelgaas: changelog]
Fixes: ee8d41e53e "pci/msi: Retrieve affinity for a vector"
Signed-off-by: Jan Beulich <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
CC: Thomas Gleixner <[email protected]>
d1d111e073