[PATCH 42/46] qdev: Smooth error checking with Coccinelle

[Markus Armbruster]

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, args2;
    typedef Error;
    Error *err;
    identifier errp;
    @@
    -      fun(args, &err, args2);
    -      if (err) {
    +      if (!fun(args, errp, args2)) {
               ... when != err
    -      error_propagate(errp, err);
               ...
           }

    @@
    identifier fun = qdev_prop_set_drive_err;
    expression list args, args2;
    typedef Error;
    Error *err;
    @@
    -      fun(args, &err, args2);
    -      if (err) {
    +      if (!fun(args, &err, args2)) {
               ...
           }

Eliminate error_propagate() that are now unnecessary.  Delete @err
that are now unused.  Tidy up line breaks and whitespace.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 hw/scsi/scsi-bus.c | 5 +----
 hw/sd/sd.c         | 3 +--
 hw/sd/ssi-sd.c     | 5 ++---
 3 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index b937df16bc..df65cc2223 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -248,7 +248,6 @@ SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, 
BlockBackend *blk,
     const char *driver;
     char *name;
     DeviceState *dev;
-    Error *err = NULL;
     DriveInfo *dinfo;
 
     if (blk_is_sg(blk)) {
@@ -277,9 +276,7 @@ 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) {
-        error_propagate(errp, err);
+    if (!qdev_prop_set_drive_err(dev, "drive", blk, errp)) {
         object_unparent(OBJECT(dev));
         return NULL;
     }
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 97a9d32964..5137168d66 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -706,8 +706,7 @@ SDState *sd_init(BlockBackend *blk, bool is_spi)
 
     obj = object_new(TYPE_SD_CARD);
     dev = DEVICE(obj);
-    qdev_prop_set_drive_err(dev, "drive", blk, &err);
-    if (err) {
+    if (!qdev_prop_set_drive_err(dev, "drive", blk, &err)) {
         error_reportf_err(err, "sd_init failed: ");
         return NULL;
     }
diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
index 4d91f603fa..e0fb9f3093 100644
--- a/hw/sd/ssi-sd.c
+++ b/hw/sd/ssi-sd.c
@@ -254,9 +254,8 @@ static void ssi_sd_realize(SSISlave *d, Error **errp)
     dinfo = drive_get_next(IF_SD);
     carddev = qdev_new(TYPE_SD_CARD);
     if (dinfo) {
-        qdev_prop_set_drive_err(carddev, "drive", blk_by_legacy_dinfo(dinfo),
-                                &err);
-        if (err) {
+        if (!qdev_prop_set_drive_err(carddev, "drive",
+                                     blk_by_legacy_dinfo(dinfo), &err)) {
             goto fail;
         }
     }
-- 
2.26.2