[Qemu-devel] [PATCH v2 2/4] Add Error **errp for xen_pt_setup_vga()

[Cao jin]

To catch the error msg. Also modify the caller

Signed-off-by: Cao jin <address@hidden>
---
 hw/xen/xen_pt.c          |  5 ++++-
 hw/xen/xen_pt.h          |  3 ++-
 hw/xen/xen_pt_graphics.c | 11 ++++++-----
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
index 1bd4109..fbce55c 100644
--- a/hw/xen/xen_pt.c
+++ b/hw/xen/xen_pt.c
@@ -807,7 +807,10 @@ static int xen_pt_initfn(PCIDevice *d)
             return -1;
         }
 
-        if (xen_pt_setup_vga(s, &s->real_device) < 0) {
+        xen_pt_setup_vga(s, &s->real_device, &local_err);
+        if (local_err) {
+            error_append_hint(&local_err, "Setup VGA BIOS of passthrough"
+                    " GFX failed!");
             XEN_PT_ERR(d, "Setup VGA BIOS of passthrough GFX failed!\n");
             xen_host_pci_device_put(&s->real_device);
             return -1;
diff --git a/hw/xen/xen_pt.h b/hw/xen/xen_pt.h
index c545280..dc74d3e 100644
--- a/hw/xen/xen_pt.h
+++ b/hw/xen/xen_pt.h
@@ -328,5 +328,6 @@ static inline bool is_igd_vga_passthrough(XenHostPCIDevice 
*dev)
 }
 int xen_pt_register_vga_regions(XenHostPCIDevice *dev);
 int xen_pt_unregister_vga_regions(XenHostPCIDevice *dev);
-int xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev);
+void xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev,
+                     Error **errp);
 #endif /* !XEN_PT_H */
diff --git a/hw/xen/xen_pt_graphics.c b/hw/xen/xen_pt_graphics.c
index df6069b..a0a7e9c 100644
--- a/hw/xen/xen_pt_graphics.c
+++ b/hw/xen/xen_pt_graphics.c
@@ -161,7 +161,8 @@ struct pci_data {
     uint16_t reserved;
 } __attribute__((packed));
 
-int xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev)
+void xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev,
+                     Error **errp)
 {
     unsigned char *bios = NULL;
     struct rom_header *rom;
@@ -172,13 +173,14 @@ int xen_pt_setup_vga(XenPCIPassthroughState *s, 
XenHostPCIDevice *dev)
     struct pci_data *pd = NULL;
 
     if (!is_igd_vga_passthrough(dev)) {
-        return -1;
+        error_setg(errp, "Need to enable igd-passthrough");
+        return;
     }
 
     bios = get_vgabios(s, &bios_size, dev);
     if (!bios) {
-        XEN_PT_ERR(&s->dev, "VGA: Can't getting VBIOS!\n");
-        return -1;
+        error_setg(errp, "VGA: Can't getting VBIOS!");
+        return;
     }
 
     /* Currently we fixed this address as a primary. */
@@ -203,7 +205,6 @@ int xen_pt_setup_vga(XenPCIPassthroughState *s, 
XenHostPCIDevice *dev)
 
     /* Currently we fixed this address as a primary for legacy BIOS. */
     cpu_physical_memory_rw(0xc0000, bios, bios_size, 1);
-    return 0;
 }
 
 uint32_t igd_read_opregion(XenPCIPassthroughState *s)
-- 
2.1.0