misc: pci_endpoint_test: Free IRQs before removing the device

commit f61b7634 upstream.

In pci_endpoint_test_remove(), freeing the IRQs after removing the device
creates a small race window for IRQs to be received with the test device
memory already released, causing the IRQ handler to access invalid memory,
resulting in an oops.

Free the device IRQs before removing the device to avoid this issue.

Link: https://lore.kernel.org/r/20230415023542.77601-15-dlemoal@kernel.org


Fixes: e0332712 ("pci_endpoint_test: Add 2 ioctl commands")
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>