misc: pci_endpoint_test: Fix 'irq_type' to convey the correct type

commit baaef0a274cfb75f9b50eab3ef93205e604f662c upstream.

There are two variables that indicate the interrupt type to be used
in the next test execution, "irq_type" as global and "test->irq_type".

The global is referenced from pci_endpoint_test_get_irq() to preserve
the current type for ioctl(PCITEST_GET_IRQTYPE).

The type set in this function isn't reflected in the global "irq_type",
so ioctl(PCITEST_GET_IRQTYPE) returns the previous type.

As a result, the wrong type is displayed in old version of "pcitest"
as follows:

  - Result of running "pcitest -i 0"

      SET IRQ TYPE TO LEGACY:         OKAY

  - Result of running "pcitest -I"

      GET IRQ TYPE:           MSI

Whereas running the new version of "pcitest" in kselftest results in an
error as follows:

  #  RUN           pci_ep_basic.LEGACY_IRQ_TEST ...
  # pci_endpoint_test.c:104:LEGACY_IRQ_TEST:Expected 0 (0) == ret (1)
  # pci_endpoint_test.c:104:LEGACY_IRQ_TEST:Can't get Legacy IRQ type

Fix this issue by propagating the current type to the global "irq_type".

Fixes: b2ba922 ("misc: pci_endpoint_test: Avoid using module parameter to determine irqtype")
Signed-off-by: Kunihiko Hayashi <[email protected]>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Reviewed-by: Niklas Cassel <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Kunihiko Hayashi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
(cherry picked from commit f241e4a78f6aa02b3834d9b8383efbef21a3375e)
Signed-off-by: Vijayendra Suman <[email protected]>

Author: khayash1

drivers/misc/pci_endpoint_test.c

@@ -717,6 +717,7 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
 	if (!pci_endpoint_test_request_irq(test))
 		goto err;
 
+	irq_type = test->irq_type;
 	return true;
 
 err: