[Xen-changelog] [qemu-xen master] xen/pt: Log xen_host_pci_get/set errors in MSI code.

[patchbot@xxxxxxx]

commit c2d472e6d70e7dc6fdf7d1ff003d69d59adbf113
Author:     Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
AuthorDate: Wed Jun 24 17:27:40 2015 -0400
Commit:     Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
CommitDate: Wed Dec 2 14:22:04 2015 +0000

    xen/pt: Log xen_host_pci_get/set errors in MSI code.
    
    We seem to only use these functions when de-activating the
    MSI - so just log errors.
    
    Reviewed-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
    Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
    Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 hw/xen/xen_pt_msi.c |   18 ++++++++++++++----
 1 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/hw/xen/xen_pt_msi.c b/hw/xen/xen_pt_msi.c
index 71c872b..82de2bc 100644
--- a/hw/xen/xen_pt_msi.c
+++ b/hw/xen/xen_pt_msi.c
@@ -75,19 +75,29 @@ static int msi_msix_enable(XenPCIPassthroughState *s,
                            bool enable)
 {
     uint16_t val = 0;
+    int rc;
 
     if (!address) {
         return -1;
     }
 
-    xen_host_pci_get_word(&s->real_device, address, &val);
+    rc = xen_host_pci_get_word(&s->real_device, address, &val);
+    if (rc) {
+        XEN_PT_ERR(&s->dev, "Failed to read MSI/MSI-X register (0x%x), 
rc:%d\n",
+                   address, rc);
+        return rc;
+    }
     if (enable) {
         val |= flag;
     } else {
         val &= ~flag;
     }
-    xen_host_pci_set_word(&s->real_device, address, val);
-    return 0;
+    rc = xen_host_pci_set_word(&s->real_device, address, val);
+    if (rc) {
+        XEN_PT_ERR(&s->dev, "Failed to write MSI/MSI-X register (0x%x), 
rc:%d\n",
+                   address, rc);
+    }
+    return rc;
 }
 
 static int msi_msix_setup(XenPCIPassthroughState *s,
@@ -276,7 +286,7 @@ void xen_pt_msi_disable(XenPCIPassthroughState *s)
         return;
     }
 
-    xen_pt_msi_set_enable(s, false);
+    (void)xen_pt_msi_set_enable(s, false);
 
     msi_msix_disable(s, msi_addr64(msi), msi->data, msi->pirq, false,
                      msi->initialized);
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master

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