linux-phytec-ti

PCI: endpoint: Fix missing mutex_unlock in error case

There is a missing mutex_unlock() in pci_epc_add_epf() in one of the
error scenarios. Fix it here.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>