error: Consistently name Error * objects err, and not errp

This touches code in xen_enable_tpm() that is obviously wrong.  Since
I don't know how to fix it properly, I'm adding a FIXME there.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20251119130855.105479-6-armbru@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>

block/crypto.c

@@ -938,14 +938,14 @@ static void GRAPH_RDLOCK
 block_crypto_amend_cleanup(BlockDriverState *bs)
 {
     BlockCrypto *crypto = bs->opaque;
-    Error *errp = NULL;
+    Error *err = NULL;
 
     /* release exclusive read/write permissions to the underlying file */
     crypto->updating_keys = false;
-    bdrv_child_refresh_perms(bs, bs->file, &errp);
+    bdrv_child_refresh_perms(bs, bs->file, &err);
 
-    if (errp) {
-        error_report_err(errp);
+    if (err) {
+        error_report_err(err);
     }
 }
 

hw/acpi/ghes.c

@@ -564,7 +564,7 @@ int acpi_ghes_memory_errors(AcpiGhesState *ags, uint16_t source_id,
     const uint8_t guid[] =
           UUID_LE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
                   0xED, 0x7C, 0x83, 0xB1);
-    Error *errp = NULL;
+    Error *err = NULL;
     int data_length;
     GArray *block;
 
@@ -584,12 +584,12 @@ int acpi_ghes_memory_errors(AcpiGhesState *ags, uint16_t source_id,
     acpi_ghes_build_append_mem_cper(block, physical_address);
 
     /* Report the error */
-    ghes_record_cper_errors(ags, block->data, block->len, source_id, &errp);
+    ghes_record_cper_errors(ags, block->data, block->len, source_id, &err);
 
     g_array_free(block, true);
 
-    if (errp) {
-        error_report_err(errp);
+    if (err) {
+        error_report_err(err);
         return -1;
     }
 

hw/ppc/spapr.c

@@ -2848,7 +2848,7 @@ static void spapr_machine_init(MachineState *machine)
     int i;
     MemoryRegion *sysmem = get_system_memory();
     long load_limit, fw_size;
-    Error *errp = NULL;
+    Error *err = NULL;
     NICInfo *nd;
 
     if (!filename) {
@@ -2872,7 +2872,7 @@ static void spapr_machine_init(MachineState *machine)
     /* Determine capabilities to run with */
     spapr_caps_init(spapr);
 
-    kvmppc_check_papr_resize_hpt(&errp);
+    kvmppc_check_papr_resize_hpt(&err);
     if (spapr->resize_hpt == SPAPR_RESIZE_HPT_DEFAULT) {
         /*
          * If the user explicitly requested a mode we should either
@@ -2880,10 +2880,10 @@ static void spapr_machine_init(MachineState *machine)
          * it's not set explicitly, we reset our mode to something
          * that works
          */
-        if (errp) {
+        if (err) {
             spapr->resize_hpt = SPAPR_RESIZE_HPT_DISABLED;
-            error_free(errp);
-            errp = NULL;
+            error_free(err);
+            err = NULL;
         } else {
             spapr->resize_hpt = smc->resize_hpt_default;
         }
@@ -2891,14 +2891,14 @@ static void spapr_machine_init(MachineState *machine)
 
     assert(spapr->resize_hpt != SPAPR_RESIZE_HPT_DEFAULT);
 
-    if ((spapr->resize_hpt != SPAPR_RESIZE_HPT_DISABLED) && errp) {
+    if ((spapr->resize_hpt != SPAPR_RESIZE_HPT_DISABLED) && err) {
         /*
          * User requested HPT resize, but this host can't supply it.  Bail out
          */
-        error_report_err(errp);
+        error_report_err(err);
         exit(1);
     }
-    error_free(errp);
+    error_free(err);
 
     spapr->rma_size = spapr_rma_size(spapr, &error_fatal);
 

hw/xen/xen-pvh-common.c

@@ -101,7 +101,7 @@ static void xen_create_virtio_mmio_devices(XenPVHMachineState *s)
 #ifdef CONFIG_TPM
 static void xen_enable_tpm(XenPVHMachineState *s)
 {
-    Error *errp = NULL;
+    Error *err = NULL;
     DeviceState *dev;
     SysBusDevice *busdev;
 
@@ -111,8 +111,15 @@ static void xen_enable_tpm(XenPVHMachineState *s)
         return;
     }
     dev = qdev_new(TYPE_TPM_TIS_SYSBUS);
-    object_property_set_link(OBJECT(dev), "tpmdev", OBJECT(be), &errp);
-    object_property_set_str(OBJECT(dev), "tpmdev", be->id, &errp);
+    /*
+     * FIXME This use of &err is is wrong.  If both calls fail, the
+     * second will trip error_setv()'s assertion.  If just one call
+     * fails, we leak an Error object.  Setting the same property
+     * twice (first to a QOM path, then to an ID string) is almost
+     * certainly wrong, too.
+     */
+    object_property_set_link(OBJECT(dev), "tpmdev", OBJECT(be), &err);
+    object_property_set_str(OBJECT(dev), "tpmdev", be->id, &err);
     busdev = SYS_BUS_DEVICE(dev);
     sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, s->cfg.tpm.base);

nbd/common.c

@@ -282,10 +282,10 @@ void nbd_set_socket_send_buffer(QIOChannelSocket *sioc)
 #ifdef UNIX_STREAM_SOCKET_SEND_BUFFER_SIZE
     if (sioc->localAddr.ss_family == AF_UNIX) {
         size_t size = UNIX_STREAM_SOCKET_SEND_BUFFER_SIZE;
-        Error *errp = NULL;
+        Error *err = NULL;
 
-        if (qio_channel_socket_set_send_buffer(sioc, size, &errp) < 0) {
-            warn_report_err(errp);
+        if (qio_channel_socket_set_send_buffer(sioc, size, &err) < 0) {
+            warn_report_err(err);
         }
     }
 #endif /* UNIX_STREAM_SOCKET_SEND_BUFFER_SIZE */