hw/block: Use errp directly rather than local_err

[Drop virtio_blk_data_plane_create() change that misinterprets return
value when the virtio transport does not support dataplane.
--Stefan]

Cc: John Snow <jsnow@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>

Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: e77848d3735ba590f23ffbf8094379c646c33d79.1511317952.git.maozy.fnst@cn.fujitsu.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

6 files changed, 24 insertions, 47 deletions

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 67f78ac..7b7dd41 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -473,16 +473,13 @@ static void fd_revalidate(FDrive *drv)
 static void fd_change_cb(void *opaque, bool load, Error **errp)
 {
     FDrive *drive = opaque;
-    Error *local_err = NULL;
 
     if (!load) {
         blk_set_perm(drive->blk, 0, BLK_PERM_ALL, &error_abort);
     } else {
-        blkconf_apply_backend_options(drive->conf,
-                                      blk_is_read_only(drive->blk), false,
-                                      &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
+        if (!blkconf_apply_backend_options(drive->conf,
+                                           blk_is_read_only(drive->blk), false,
+                                           errp)) {
             return;
         }
     }
@@ -522,7 +519,6 @@ static void floppy_drive_realize(DeviceState *qdev, Error **errp)
     FloppyDrive *dev = FLOPPY_DRIVE(qdev);
     FloppyBus *bus = FLOPPY_BUS(qdev->parent_bus);
     FDrive *drive;
-    Error *local_err = NULL;
     int ret;
 
     if (dev->unit == -1) {
@@ -568,10 +564,9 @@ static void floppy_drive_realize(DeviceState *qdev, Error **errp)
     dev->conf.rerror = BLOCKDEV_ON_ERROR_AUTO;
     dev->conf.werror = BLOCKDEV_ON_ERROR_AUTO;
 
-    blkconf_apply_backend_options(&dev->conf, blk_is_read_only(dev->conf.blk),
-                                  false, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
+    if (!blkconf_apply_backend_options(&dev->conf,
+                                       blk_is_read_only(dev->conf.blk),
+                                       false, errp)) {
         return;
     }
 
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index e530ba7..e529e88 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -928,7 +928,6 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp)
     int i;
     int64_t bs_size;
     uint8_t *pci_conf;
-    Error *local_err = NULL;
 
     if (!n->conf.blk) {
         error_setg(errp, "drive property not set");
@@ -947,10 +946,8 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp)
         return;
     }
     blkconf_blocksizes(&n->conf);
-    blkconf_apply_backend_options(&n->conf, blk_is_read_only(n->conf.blk),
-                                  false, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
+    if (!blkconf_apply_backend_options(&n->conf, blk_is_read_only(n->conf.blk),
+                                       false, errp)) {
         return;
     }
 
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 05d1440..41a4ccded 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -930,19 +930,16 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
     }
 
     blkconf_serial(&conf->conf, &conf->serial);
-    blkconf_apply_backend_options(&conf->conf,
-                                  blk_is_read_only(conf->conf.blk), true,
-                                  &err);
-    if (err) {
-        error_propagate(errp, err);
+    if (!blkconf_apply_backend_options(&conf->conf,
+                                       blk_is_read_only(conf->conf.blk), true,
+                                       errp)) {
         return;
     }
     s->original_wce = blk_enable_write_cache(conf->conf.blk);
-    blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, &err);
-    if (err) {
-        error_propagate(errp, err);
+    if (!blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, errp)) {
         return;
     }
+
     blkconf_blocksizes(&conf->conf);
 
     virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK,
diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index a5181b4..f395d24 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -160,7 +160,6 @@ static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
 {
     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
     IDEState *s = bus->ifs + dev->unit;
-    Error *err = NULL;
     int ret;
 
     if (!dev->conf.blk) {
@@ -191,16 +190,13 @@ static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
 
     blkconf_serial(&dev->conf, &dev->serial);
     if (kind != IDE_CD) {
-        blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255, &err);
-        if (err) {
-            error_propagate(errp, err);
+        if (!blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255,
+                              errp)) {
             return;
         }
     }
-    blkconf_apply_backend_options(&dev->conf, kind == IDE_CD, kind != IDE_CD,
-                                  &err);
-    if (err) {
-        error_propagate(errp, err);
+    if (!blkconf_apply_backend_options(&dev->conf, kind == IDE_CD,
+                                       kind != IDE_CD, errp)) {
         return;
     }
 
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 1243117..870d9ae 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -2332,7 +2332,6 @@ static void scsi_disk_unit_attention_reported(SCSIDevice *dev)
 static void scsi_realize(SCSIDevice *dev, Error **errp)
 {
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
-    Error *err = NULL;
 
     if (!s->qdev.conf.blk) {
         error_setg(errp, "drive property not set");
@@ -2356,17 +2355,13 @@ static void scsi_realize(SCSIDevice *dev, Error **errp)
     }
 
     if (dev->type == TYPE_DISK) {
-        blkconf_geometry(&dev->conf, NULL, 65535, 255, 255, &err);
-        if (err) {
-            error_propagate(errp, err);
+        if (!blkconf_geometry(&dev->conf, NULL, 65535, 255, 255, errp)) {
             return;
         }
     }
-    blkconf_apply_backend_options(&dev->conf,
-                                  blk_is_read_only(s->qdev.conf.blk),
-                                  dev->type == TYPE_DISK, &err);
-    if (err) {
-        error_propagate(errp, err);
+    if (!blkconf_apply_backend_options(&dev->conf,
+                                       blk_is_read_only(s->qdev.conf.blk),
+                                       dev->type == TYPE_DISK, errp)) {
         return;
     }
 
diff --git a/hw/usb/dev-storage.c b/hw/usb/dev-storage.c
index 8a61ec9..a9bcc67 100644
--- a/hw/usb/dev-storage.c
+++ b/hw/usb/dev-storage.c
@@ -601,7 +601,6 @@ static void usb_msd_realize_storage(USBDevice *dev, Error **errp)
     MSDState *s = USB_STORAGE_DEV(dev);
     BlockBackend *blk = s->conf.blk;
     SCSIDevice *scsi_dev;
-    Error *err = NULL;
 
     if (!blk) {
         error_setg(errp, "drive property not set");
@@ -610,9 +609,8 @@ static void usb_msd_realize_storage(USBDevice *dev, Error **errp)
 
     blkconf_serial(&s->conf, &dev->serial);
     blkconf_blocksizes(&s->conf);
-    blkconf_apply_backend_options(&s->conf, blk_is_read_only(blk), true, &err);
-    if (err) {
-        error_propagate(errp, err);
+    if (!blkconf_apply_backend_options(&s->conf, blk_is_read_only(blk), true,
+                                       errp)) {
         return;
     }
 
@@ -636,10 +634,9 @@ static void usb_msd_realize_storage(USBDevice *dev, Error **errp)
                  &usb_msd_scsi_info_storage, NULL);
     scsi_dev = scsi_bus_legacy_add_drive(&s->bus, blk, 0, !!s->removable,
                                          s->conf.bootindex, dev->serial,
-                                         &err);
+                                         errp);
     blk_unref(blk);
     if (!scsi_dev) {
-        error_propagate(errp, err);
         return;
     }
     usb_msd_handle_reset(dev);