checkpatch: don't error out on },{ lines

When having code like this:

    static PCIDeviceInfo piix_ide_info[] = {
        {
            .qdev.name    = "piix3-ide",
            .qdev.size    = sizeof(PCIIDEState),
            .qdev.no_user = 1,
            .no_hotplug   = 1,
            .init         = pci_piix_ide_initfn,
            .vendor_id    = PCI_VENDOR_ID_INTEL,
            .device_id    = PCI_DEVICE_ID_INTEL_82371SB_1,
            .class_id     = PCI_CLASS_STORAGE_IDE,
        },{
            .qdev.name    = "piix4-ide",
            .qdev.size    = sizeof(PCIIDEState),
            .qdev.no_user = 1,
            .no_hotplug   = 1,
            .init         = pci_piix_ide_initfn,
            .vendor_id    = PCI_VENDOR_ID_INTEL,
            .device_id    = PCI_DEVICE_ID_INTEL_82371AB,
            .class_id     = PCI_CLASS_STORAGE_IDE,
        },{
            /* end of list */
        }
    };

checkpatch currently errors out, claiming that spaces need to follow
commas. However, this particular style of defining structs is pretty
common in qemu code and very readable. So let's declare it as supported
for the above case.

Reported-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 075b614..70a2111 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2068,8 +2068,10 @@ sub process {
                                        }
 
                                # , must have a space on the right.
+                                # not required when having a single },{ on one line
                                } elsif ($op eq ',') {
-                                       if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
+                                       if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/ &&
+                                            ($elements[$n] . $elements[$n + 2]) !~ " *}{") {
                                                ERROR("space required after that '$op' $at\n" . $hereptr);
                                        }