tree 466bcceba53fe029c80f581242e388064ab23fa4
parent 1001354ca34179f3db924eb66672442a173147dc
author Jan Beulich <JBeulich@suse.com> 1478591034 -0700
committer Bjorn Helgaas <bhelgaas@google.com> 1478640917 -0600

PCI/MSI: Check for NULL affinity mask in pci_irq_get_affinity()

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: ee8d41e53efe "pci/msi: Retrieve affinity for a vector"
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
CC: Thomas Gleixner <tglx@linutronix.de>