misc: pci_endpoint_test: Fix displaying 'irq_type' after 'request_irq' error

commit 919d14603dab6a9cf03ebbeb2cfa556df48737c8 upstream.

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

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

In the pci_endpoint_test_request_irq(), since this global variable
is referenced when an error occurs, the unintended error message is
displayed.

For example, after running "pcitest -i 2", the following message
shows "MSI 3" even if the current IRQ type becomes "MSI-X":

  pci-endpoint-test 0000:01:00.0: Failed to request IRQ 30 for MSI 3
  SET IRQ TYPE TO MSI-X:          NOT OKAY

Fix this issue by using "test->irq_type" instead of global "irq_type".

Cc: [email protected]
Fixes: b2ba922 ("misc: pci_endpoint_test: Avoid using module parameter to determine irqtype")
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Signed-off-by: Kunihiko Hayashi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Signed-off-by: Kunihiko Hayashi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
(cherry picked from commit 30f2cd70c4f90dc4bdb0138595c45396479cbeb6)
Signed-off-by: Vijayendra Suman <[email protected]>

Author: khayash1

drivers/misc/pci_endpoint_test.c

@@ -245,7 +245,7 @@ static bool pci_endpoint_test_request_irq(struct pci_endpoint_test *test)
 	return true;
 
 fail:
-	switch (irq_type) {
+	switch (test->irq_type) {
 	case IRQ_TYPE_LEGACY:
 		dev_err(dev, "Failed to request IRQ %d for Legacy\n",
 			pci_irq_vector(pdev, i));