PCI/MSI: Return failure when msix_setup_entries() fails

[ Upstream commit 3adfb572 ]

If alloc_msi_entry() fails, we free resources and set ret = -ENOMEM.

However, msix_setup_entries() returns 0 unconditionally.  Return the error
code instead.

Fixes: e75eafb9 ("genirq/msi: Switch to new irq spreading infrastructure")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/pci/msi.c

@@ -730,7 +730,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
 	ret = 0;
 out:
 	kfree(masks);
-	return 0;
+	return ret;
 }
 
 static void msix_program_entries(struct pci_dev *dev,