xen/pci: Bubble up error and fix description.

The function is never called under PV guests, and only shows up
when MSI (or MSI-X) cannot be allocated. Convert the message
to include the error value.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
OraBug: 25497392

(cherry picked from commit 577f79e411b7a81a8ae7ae4daf5d4056ebbfbc58)
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 64dd6b4b1243ccf78306e7b84facb6c6986b0946..e733d87ea2960e10b3dbc46f0c1a2398be246bc0 100644 (file)
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -264,8 +264,8 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
        return 0;
 
 error:
-       dev_err(&dev->dev,
-               "Xen PCI frontend has not registered MSI/MSI-X support!\n");
+       dev_err(&dev->dev, "Failed to create MSI%s! ret=%d!\n",
+               type == PCI_CAP_ID_MSI ? "" : "-X", irq);
        return irq;
 }