diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index bfaed1aebf..962f98fee2 100644
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -13,6 +13,7 @@
 #include "qemu/error-report.h"
 #include "qapi/error.h"
 #include "sysemu/device_tree.h"
+#include "hw/block/flash.h"
 #include "hw/boards.h"
 #include "hw/sysbus.h"
 #include "hw/arm/fdt.h"
@@ -759,7 +760,7 @@ static void versal_virt_init(MachineState *machine)
             flash_klass = object_class_by_name(s->ospi_model);
             if (!flash_klass ||
                 object_class_is_abstract(flash_klass) ||
-                !object_class_dynamic_cast(flash_klass, "m25p80-generic")) {
+                !object_class_dynamic_cast(flash_klass, TYPE_M25P80)) {
                 error_setg(&error_fatal, "'%s' is either abstract or"
                        " not a subtype of m25p80", s->ospi_model);
                 return;
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index 08a00a6d9b..8dec134832 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -515,7 +515,6 @@ struct M25P80Class {
     FlashPartInfo *pi;
 };
 
-#define TYPE_M25P80 "m25p80-generic"
 OBJECT_DECLARE_TYPE(Flash, M25P80Class, M25P80)
 
 static inline Manufacturer get_man(Flash *s)
diff --git a/hw/ppc/pnv_i2c.c b/hw/ppc/pnv_i2c.c
index 4581cc5e5d..eec5047ce8 100644
--- a/hw/ppc/pnv_i2c.c
+++ b/hw/ppc/pnv_i2c.c
@@ -557,6 +557,9 @@ static void pnv_i2c_class_init(ObjectClass *klass, void *data)
 
     xscomc->dt_xscom = pnv_i2c_dt_xscom;
 
+    /* Reason: This device is part of the CPU and cannot be used separately */
+    dc->user_creatable = false;
+
     dc->desc = "PowerNV I2C";
     dc->realize = pnv_i2c_realize;
     device_class_set_props(dc, pnv_i2c_properties);
diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
index 3c93936fd1..6e1a84c197 100644
--- a/hw/ssi/aspeed_smc.c
+++ b/hw/ssi/aspeed_smc.c
@@ -23,6 +23,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "hw/block/flash.h"
 #include "hw/sysbus.h"
 #include "migration/vmstate.h"
 #include "qemu/log.h"
@@ -695,6 +696,14 @@ static void aspeed_smc_reset(DeviceState *d)
     for (i = 0; i < asc->cs_num_max; i++) {
         DeviceState *dev = ssi_get_cs(s->spi, i);
         if (dev) {
+            Object *o = OBJECT(dev);
+
+            if (!object_dynamic_cast(o, TYPE_M25P80)) {
+                warn_report("Aspeed SMC %s.%d : Invalid %s device type",
+                            BUS(s->spi)->name, i, object_get_typename(o));
+                continue;
+            }
+
             qemu_irq cs_line = qdev_get_gpio_in_named(dev, SSI_GPIO_CS, 0);
             qdev_connect_gpio_out_named(DEVICE(s), "cs", i, cs_line);
         }
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index bafddb8f5a..8827ffe636 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -118,10 +118,12 @@ static int iommufd_cdev_getfd(const char *sysfs_path, Error **errp)
 {
     ERRP_GUARD();
     long int ret = -ENOTTY;
-    char *path, *vfio_dev_path = NULL, *vfio_path = NULL;
+    g_autofree char *path = NULL;
+    g_autofree char *vfio_dev_path = NULL;
+    g_autofree char *vfio_path = NULL;
     DIR *dir = NULL;
     struct dirent *dent;
-    gchar *contents;
+    g_autofree gchar *contents = NULL;
     gsize length;
     int major, minor;
     dev_t vfio_devt;
@@ -130,7 +132,7 @@ static int iommufd_cdev_getfd(const char *sysfs_path, Error **errp)
     dir = opendir(path);
     if (!dir) {
         error_setg_errno(errp, errno, "couldn't open directory %s", path);
-        goto out_free_path;
+        goto out;
     }
 
     while ((dent = readdir(dir))) {
@@ -147,14 +149,13 @@ static int iommufd_cdev_getfd(const char *sysfs_path, Error **errp)
 
     if (!g_file_get_contents(vfio_dev_path, &contents, &length, NULL)) {
         error_setg(errp, "failed to load \"%s\"", vfio_dev_path);
-        goto out_free_dev_path;
+        goto out_close_dir;
     }
 
     if (sscanf(contents, "%d:%d", &major, &minor) != 2) {
         error_setg(errp, "failed to get major:minor for \"%s\"", vfio_dev_path);
-        goto out_free_dev_path;
+        goto out_close_dir;
     }
-    g_free(contents);
     vfio_devt = makedev(major, minor);
 
     vfio_path = g_strdup_printf("/dev/vfio/devices/%s", dent->d_name);
@@ -164,17 +165,13 @@ static int iommufd_cdev_getfd(const char *sysfs_path, Error **errp)
     }
 
     trace_iommufd_cdev_getfd(vfio_path, ret);
-    g_free(vfio_path);
 
-out_free_dev_path:
-    g_free(vfio_dev_path);
 out_close_dir:
     closedir(dir);
-out_free_path:
+out:
     if (*errp) {
         error_prepend(errp, VFIO_MSG_PREFIX, path);
     }
-    g_free(path);
 
     return ret;
 }
diff --git a/include/hw/block/flash.h b/include/hw/block/flash.h
index de93756cbe..2b5ccd92f4 100644
--- a/include/hw/block/flash.h
+++ b/include/hw/block/flash.h
@@ -78,6 +78,8 @@ extern const VMStateDescription vmstate_ecc_state;
 
 /* m25p80.c */
 
+#define TYPE_M25P80 "m25p80-generic"
+
 BlockBackend *m25p80_get_blk(DeviceState *dev);
 
 #endif