qdev: Use returned bool to check for failure, Coccinelle part

The previous commit enables conversion of

    qdev_prop_set_drive_err(..., &err);
    if (err) {
    ...
    }

to

    if (!qdev_prop_set_drive_err(..., errp)) {
    ...
    }

Coccinelle script:

    @@
    identifier fun = qdev_prop_set_drive_err;
    expression list args;
    typedef Error;
    Error *err;
    @@
    -    fun(args, &err);
    -    if (err)
    +    if (!fun(args, &err))
         {
             ...
         }

One line break tidied up manually.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200707160613.848843-33-armbru@redhat.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index a83939f..38b66a2 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -277,8 +277,7 @@ SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
     if (serial && object_property_find(OBJECT(dev), "serial", NULL)) {
         qdev_prop_set_string(dev, "serial", serial);
     }
-    qdev_prop_set_drive_err(dev, "drive", blk, &err);
-    if (err) {
+    if (!qdev_prop_set_drive_err(dev, "drive", blk, &err)) {
         error_propagate(errp, err);
         object_unparent(OBJECT(dev));
         return NULL;