While handling link status change (LSC) interrupt, all interrupts are
blocked until delayed interrupt handler finishes.
The wait duration is at least one second and this may cause timeouts in
VF to PF mailbox.
Make sure only LSC interrupt is blocked while waiting for delayed
interrupt handler to finish.
Fixes: 0a45657a6794 ("pci: rework interrupt handling")
Cc: stable@dpdk.org
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
9b66721070