[patch] PCI: xilinx: testing wrong variable in setup irq function

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We should be testing "hwirq" instead of "irq".  "irq" is unsigned so
it's never less than zero.  Also it's uninitialized.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
index 44f8944..ccc496b 100644
--- a/drivers/pci/host/pcie-xilinx.c
+++ b/drivers/pci/host/pcie-xilinx.c
@@ -359,8 +359,8 @@ static int xilinx_pcie_msi_setup_irq(struct msi_chip *chip,
 	phys_addr_t msg_addr;
 
 	hwirq = xilinx_pcie_assign_msi(port);
-	if (irq < 0)
-		return irq;
+	if (hwirq < 0)
+		return hwirq;
 
 	irq = irq_create_mapping(port->irq_domain, hwirq);
 	if (!irq)
--
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