pci_add storage: fix error handling for 'if' parameter (Eduardo Habkost)

This fixes:

 - The error message to show the actual if= argument value. It was showing
   the filename instead, because 'buf' is reaused on the filename parsing.
 - A bug that makes a block device to be created even when an unsupported if= arg
   is passed to pci_add.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/branches/stable_0_10@6987 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/hw/pci-hotplug.c b/hw/pci-hotplug.c
index 628676444e40b7ea32c714ecc48c1ec2f777d3f7..fa3a5e0932e79bf3dac5dacf6776200d5b7224e2 100644 (file)
--- a/hw/pci-hotplug.c
+++ b/hw/pci-hotplug.c
@@ -95,19 +95,22 @@ static PCIDevice *qemu_pci_hot_add_storage(PCIBus *pci_bus, const char *opts)
             type = IF_SCSI;
         else if (!strcmp(buf, "virtio")) {
             type = IF_VIRTIO;
+        } else {
+            term_printf("type %s not a hotpluggable PCI device.\n", buf);
+            goto out;
         }
     } else {
         term_printf("no if= specified\n");
-        return NULL;
+        goto out;
     }
 
     if (get_param_value(buf, sizeof(buf), "file", opts)) {
         drive_idx = add_init_drive(opts);
         if (drive_idx < 0)
-            return NULL;
+            goto out;
     } else if (type == IF_VIRTIO) {
         term_printf("virtio requires a backing file/device.\n");
-        return NULL;
+        goto out;
     }
 
     switch (type) {
@@ -120,10 +123,9 @@ static PCIDevice *qemu_pci_hot_add_storage(PCIBus *pci_bus, const char *opts)
     case IF_VIRTIO:
         opaque = virtio_blk_init (pci_bus, drives_table[drive_idx].bdrv);
         break;
-    default:
-        term_printf ("type %s not a hotpluggable PCI device.\n", buf);
     }
 
+out:
     return opaque;
 }