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misc: pci_endpoint_test: Skip IRQ tests if irq is out of range

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The pci_endpoint_test tests the 32-bit MSI range. However, the device might
not have all vectors configured. For example, if msi_interrupts is 8 in the
ep function space or if the MSI Multiple Message Capable value is
configured as 4 (maximum 16 vectors).

In this case, do not attempt to run the test to avoid timeouts and directly
return the error value.

Signed-off-by: Christian Bruel <christian.bruel@foss.st.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20250804170916.3212221-2-christian.bruel@foss.st.com
This commit is contained in:
Christian Bruel
2025-08-27 18:39:06 +05:30
committed by Manivannan Sadhasivam
parent 27fce9e8c6
commit cc8e391067
1 changed files with 6 additions and 6 deletions
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drivers/misc/pci_endpoint_test.c
+6 -6
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@@ -436,7 +436,11 @@ static int pci_endpoint_test_msi_irq(struct pci_endpoint_test *test,
{
struct pci_dev *pdev = test->pdev;
u32 val;
int ret;
int irq;
irq = pci_irq_vector(pdev, msi_num - 1);
if (irq < 0)
return irq;
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE,
msix ? PCITEST_IRQ_TYPE_MSIX :
@@ -450,11 +454,7 @@ static int pci_endpoint_test_msi_irq(struct pci_endpoint_test *test,
if (!val)
return -ETIMEDOUT;
ret = pci_irq_vector(pdev, msi_num - 1);
if (ret < 0)
return ret;
if (ret != test->last_irq)
if (irq != test->last_irq)
return -EIO;
return 0;