pci: Make errp the last parameter of pci_add_capability()

Add Error argument for pci_add_capability() to leverage the errp
to pass info on errors. This way is helpful for its callers to
make a better error handling when moving to 'realize'.

Cc: pbonzini@redhat.com
Cc: rth@twiddle.net
Cc: ehabkost@redhat.com
Cc: mst@redhat.com
Cc: jasowang@redhat.com
Cc: marcel@redhat.com
Cc: alex.williamson@redhat.com
Cc: armbru@redhat.com
Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/hw/pci/shpc.c b/hw/pci/shpc.c
index 42fafac91b..d72d5e45f6 100644
--- a/hw/pci/shpc.c
+++ b/hw/pci/shpc.c
@@ -450,9 +450,12 @@ static int shpc_cap_add_config(PCIDevice *d)
 {
     uint8_t *config;
     int config_offset;
+    Error *local_err = NULL;
     config_offset = pci_add_capability(d, PCI_CAP_ID_SHPC,
-                                       0, SHPC_CAP_LENGTH);
+                                       0, SHPC_CAP_LENGTH,
+                                       &local_err);
     if (config_offset < 0) {
+        error_report_err(local_err);
         return config_offset;
     }
     config = d->config + config_offset;