Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2016-06-20' into staging

Error reporting patches for 2016-06-20

# gpg: Signature made Mon 20 Jun 2016 15:56:15 BST
# gpg:                using RSA key 0x3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-error-2016-06-20:
  log: Fix qemu_set_log_filename() error handling
  log: Fix qemu_set_dfilter_ranges() error reporting
  log: Plug memory leak on multiple -dfilter
  coccinelle: Remove unnecessary variables for function return value
  error: Remove unnecessary local_err variables
  error: Remove NULL checks on error_propagate() calls
  vl: Error messages need to go to stderr, fix some

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

audio/audio.c

@@ -1131,8 +1131,6 @@ static void audio_timer (void *opaque)
  */
 int AUD_write (SWVoiceOut *sw, void *buf, int size)
 {
-    int bytes;
-
     if (!sw) {
         /* XXX: Consider options */
         return size;
@@ -1143,14 +1141,11 @@ int AUD_write (SWVoiceOut *sw, void *buf, int size)
         return 0;
     }
 
-    bytes = sw->hw->pcm_ops->write (sw, buf, size);
-    return bytes;
+    return sw->hw->pcm_ops->write(sw, buf, size);
 }
 
 int AUD_read (SWVoiceIn *sw, void *buf, int size)
 {
-    int bytes;
-
     if (!sw) {
         /* XXX: Consider options */
         return size;
@@ -1161,8 +1156,7 @@ int AUD_read (SWVoiceIn *sw, void *buf, int size)
         return 0;
     }
 
-    bytes = sw->hw->pcm_ops->read (sw, buf, size);
-    return bytes;
+    return sw->hw->pcm_ops->read(sw, buf, size);
 }
 
 int AUD_get_buffer_size_out (SWVoiceOut *sw)

block.c

@@ -301,9 +301,7 @@ static void coroutine_fn bdrv_create_co_entry(void *opaque)
     assert(cco->drv);
 
     ret = cco->drv->bdrv_create(cco->filename, cco->opts, &local_err);
-    if (local_err) {
-        error_propagate(&cco->err, local_err);
-    }
+    error_propagate(&cco->err, local_err);
     cco->ret = ret;
 }
 
@@ -364,9 +362,7 @@ int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp)
     }
 
     ret = bdrv_create(drv, filename, opts, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
     return ret;
 }
 
@@ -1763,18 +1759,14 @@ fail:
     QDECREF(options);
     bs->options = NULL;
     bdrv_unref(bs);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
     return NULL;
 
 close_and_fail:
     bdrv_unref(bs);
     QDECREF(snapshot_options);
     QDECREF(options);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
     return NULL;
 }
 
@@ -3599,9 +3591,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
 out:
     qemu_opts_del(opts);
     qemu_opts_free(create_opts);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
 }
 
 AioContext *bdrv_get_aio_context(BlockDriverState *bs)

block/archipelago.c

@@ -974,11 +974,9 @@ err_exit2:
 
 static int64_t qemu_archipelago_getlength(BlockDriverState *bs)
 {
-    int64_t ret;
     BDRVArchipelagoState *s = bs->opaque;
 
-    ret = archipelago_volume_info(s);
-    return ret;
+    return archipelago_volume_info(s);
 }
 
 static int qemu_archipelago_truncate(BlockDriverState *bs, int64_t offset)

block/qcow2-cluster.c

@@ -154,11 +154,9 @@ static int l2_load(BlockDriverState *bs, uint64_t l2_offset,
     uint64_t **l2_table)
 {
     BDRVQcow2State *s = bs->opaque;
-    int ret;
 
-    ret = qcow2_cache_get(bs, s->l2_table_cache, l2_offset, (void**) l2_table);
-
-    return ret;
+    return qcow2_cache_get(bs, s->l2_table_cache, l2_offset,
+                           (void **)l2_table);
 }
 
 /*

block/qcow2-refcount.c

@@ -218,13 +218,10 @@ static int load_refcount_block(BlockDriverState *bs,
                                void **refcount_block)
 {
     BDRVQcow2State *s = bs->opaque;
-    int ret;
 
     BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_LOAD);
-    ret = qcow2_cache_get(bs, s->refcount_block_cache, refcount_block_offset,
-        refcount_block);
-
-    return ret;
+    return qcow2_cache_get(bs, s->refcount_block_cache, refcount_block_offset,
+                           refcount_block);
 }
 
 /*

block/qcow2.c

@@ -2403,9 +2403,7 @@ static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp)
     ret = qcow2_create2(filename, size, backing_file, backing_fmt, flags,
                         cluster_size, prealloc, opts, version, refcount_order,
                         &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
 
 finish:
     g_free(backing_file);

block/quorum.c

@@ -971,9 +971,7 @@ close_exit:
 exit:
     qemu_opts_del(opts);
     /* propagate error */
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
     return ret;
 }
 

block/raw-posix.c

@@ -582,15 +582,9 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
                     Error **errp)
 {
     BDRVRawState *s = bs->opaque;
-    Error *local_err = NULL;
-    int ret;
 
     s->type = FTYPE_FILE;
-    ret = raw_open_common(bs, options, flags, 0, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
-    return ret;
+    return raw_open_common(bs, options, flags, 0, errp);
 }
 
 static int raw_reopen_prepare(BDRVReopenState *state,
@@ -2236,9 +2230,7 @@ hdev_open_Mac_error:
 
     ret = raw_open_common(bs, options, flags, 0, &local_err);
     if (ret < 0) {
-        if (local_err) {
-            error_propagate(errp, local_err);
-        }
+        error_propagate(errp, local_err);
 #if defined(__APPLE__) && defined(__MACH__)
         if (*bsd_path) {
             filename = bsd_path;
@@ -2443,17 +2435,11 @@ static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
                       Error **errp)
 {
     BDRVRawState *s = bs->opaque;
-    Error *local_err = NULL;
-    int ret;
 
     s->type = FTYPE_CD;
 
     /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
-    ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
-    return ret;
+    return raw_open_common(bs, options, flags, O_NONBLOCK, errp);
 }
 
 static int cdrom_probe_device(const char *filename)
@@ -2571,9 +2557,7 @@ static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
 
     ret = raw_open_common(bs, options, flags, 0, &local_err);
     if (ret) {
-        if (local_err) {
-            error_propagate(errp, local_err);
-        }
+        error_propagate(errp, local_err);
         return ret;
     }
 

block/raw_bsd.c

@@ -190,14 +190,7 @@ static int raw_has_zero_init(BlockDriverState *bs)
 
 static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
 {
-    Error *local_err = NULL;
-    int ret;
-
-    ret = bdrv_create_file(filename, opts, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
-    return ret;
+    return bdrv_create_file(filename, opts, errp);
 }
 
 static int raw_open(BlockDriverState *bs, QDict *options, int flags,

block/rbd.c

@@ -883,10 +883,8 @@ static int qemu_rbd_snap_rollback(BlockDriverState *bs,
                                   const char *snapshot_name)
 {
     BDRVRBDState *s = bs->opaque;
-    int r;
 
-    r = rbd_snap_rollback(s->image, snapshot_name);
-    return r;
+    return rbd_snap_rollback(s->image, snapshot_name);
 }
 
 static int qemu_rbd_snap_list(BlockDriverState *bs,

block/snapshot.c

@@ -358,9 +358,7 @@ int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
         ret = bdrv_snapshot_load_tmp(bs, NULL, id_or_name, &local_err);
     }
 
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
 
     return ret;
 }

block/vmdk.c

@@ -1260,15 +1260,13 @@ static VmdkExtent *find_extent(BDRVVmdkState *s,
 static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent,
                                                    int64_t offset)
 {
-    uint64_t offset_in_cluster, extent_begin_offset, extent_relative_offset;
+    uint64_t extent_begin_offset, extent_relative_offset;
     uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE;
 
     extent_begin_offset =
         (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE;
     extent_relative_offset = offset - extent_begin_offset;
-    offset_in_cluster = extent_relative_offset % cluster_size;
-
-    return offset_in_cluster;
+    return extent_relative_offset % cluster_size;
 }
 
 static inline uint64_t vmdk_find_index_in_cluster(VmdkExtent *extent,

block/vvfat.c

@@ -114,15 +114,12 @@ static inline int array_ensure_allocated(array_t* array, int index)
 
 static inline void* array_get_next(array_t* array) {
     unsigned int next = array->next;
-    void* result;
 
     if (array_ensure_allocated(array, next) < 0)
 	return NULL;
 
     array->next = next + 1;
-    result = array_get(array, next);
-
-    return result;
+    return array_get(array, next);
 }
 
 static inline void* array_insert(array_t* array,unsigned int index,unsigned int count) {

blockdev.c

@@ -3644,9 +3644,7 @@ void qmp_drive_mirror(const char *device, const char *target,
                            has_unmap, unmap,
                            &local_err);
     bdrv_unref(target_bs);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
 out:
     aio_context_release(aio_context);
 }
@@ -3701,9 +3699,7 @@ void qmp_blockdev_mirror(const char *device, const char *target,
                            has_on_target_error, on_target_error,
                            true, true,
                            &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
 
     aio_context_release(aio_context);
 }
@@ -3914,9 +3910,7 @@ void qmp_change_backing_file(const char *device,
 
     if (ro) {
         bdrv_reopen(image_bs, open_flags, &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err); /* will preserve prior errp */
-        }
+        error_propagate(errp, local_err);
     }
 
 out:

bootdevice.c

@@ -302,9 +302,7 @@ static void device_set_bootindex(Object *obj, Visitor *v, const char *name,
     add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix);
 
 out:
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
 }
 
 static void property_release_bootindex(Object *obj, const char *name,

bsd-user/main.c

@@ -19,6 +19,7 @@
 #include "qemu/osdep.h"
 #include <machine/trap.h>
 
+#include "qapi/error.h"
 #include "qemu.h"
 #include "qemu/path.h"
 #include "qemu/help_option.h"
@@ -847,7 +848,7 @@ int main(int argc, char **argv)
 
     /* init debug */
     qemu_log_needs_buffers();
-    qemu_set_log_filename(log_file);
+    qemu_set_log_filename(log_file, &error_fatal);
     if (log_mask) {
         int mask;
 

dump.c

@@ -918,9 +918,7 @@ static void write_dump_header(DumpState *s, Error **errp)
     } else {
         create_header64(s, &local_err);
     }
-    if (local_err) {
-        error_propagate(errp, local_err);
-    }
+    error_propagate(errp, local_err);
 }
 
 static size_t dump_bitmap_get_bufsize(DumpState *s)

hw/acpi/aml-build.c

@@ -324,12 +324,9 @@ static void aml_free(gpointer data, gpointer user_data)
 
 Aml *init_aml_allocator(void)
 {
-    Aml *var;
-
     assert(!alloc_list);
     alloc_list = g_ptr_array_new();
-    var = aml_alloc();
-    return var;
+    return aml_alloc();
 }
 
 void free_aml_allocator(void)
@@ -451,12 +448,10 @@ Aml *aml_name_decl(const char *name, Aml *val)
 /* ACPI 1.0b: 16.2.6.1 Arg Objects Encoding */
 Aml *aml_arg(int pos)
 {
-    Aml *var;
     uint8_t op = 0x68 /* ARG0 op */ + pos;
 
     assert(pos <= 6);
-    var = aml_opcode(op);
-    return var;
+    return aml_opcode(op);
 }
 
 /* ACPI 2.0a: 17.2.4.4 Type 2 Opcodes Encoding: DefToInteger */
@@ -1082,12 +1077,10 @@ Aml *aml_string(const char *name_format, ...)
 /* ACPI 1.0b: 16.2.6.2 Local Objects Encoding */
 Aml *aml_local(int num)
 {
-    Aml *var;
     uint8_t op = 0x60 /* Local0Op */ + num;
 
     assert(num <= 7);
-    var = aml_opcode(op);
-    return var;
+    return aml_opcode(op);
 }
 
 /* ACPI 2.0a: 17.2.2 Data Objects Encoding: DefVarPackage */

hw/audio/intel-hda.c

@@ -219,10 +219,7 @@ static void intel_hda_reset(DeviceState *dev);
 
 static hwaddr intel_hda_addr(uint32_t lbase, uint32_t ubase)
 {
-    hwaddr addr;
-
-    addr = ((uint64_t)ubase << 32) | lbase;
-    return addr;
+    return ((uint64_t)ubase << 32) | lbase;
 }
 
 static void intel_hda_update_int_sts(IntelHDAState *d)

hw/display/vga.c

@@ -700,9 +700,7 @@ static void vbe_update_vgaregs(VGACommonState *s)
 static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
 {
     VGACommonState *s = opaque;
-    uint32_t val;
-    val = s->vbe_index;
-    return val;
+    return s->vbe_index;
 }
 
 uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)