From ef1e1e0782e99c9dcf2b35e5310cdd8ca9211374 Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Wed, 26 Aug 2015 12:17:18 +0100 Subject: maint: avoid useless "if (foo) free(foo)" pattern The free() and g_free() functions both happily accept NULL on any platform QEMU builds on. As such putting a conditional 'if (foo)' check before calls to 'free(foo)' merely serves to bloat the lines of code. Signed-off-by: Daniel P. Berrange Reviewed-by: Markus Armbruster Reviewed-by: Eric Blake Signed-off-by: Michael Tokarev --- backends/hostmem-file.c | 4 +--- bsd-user/elfload.c | 4 +--- disas/sparc.c | 3 +-- hw/bt/hci.c | 9 +++------ hw/core/loader.c | 3 +-- hw/core/qdev-properties.c | 4 +--- hw/display/exynos4210_fimd.c | 4 +--- hw/mips/mips_r4k.c | 4 +--- hw/net/fsl_etsec/rings.c | 4 +--- hw/net/rocker/rocker.c | 4 +--- hw/net/rocker/rocker_desc.c | 8 ++------ hw/nvram/fw_cfg.c | 4 +--- hw/pci-host/prep.c | 4 +--- hw/sd/sd.c | 3 +-- hw/usb/hcd-xhci.c | 4 +--- hw/xen/xen_pt_config_init.c | 4 +--- migration/savevm.c | 8 ++------ qemu-char.c | 4 +--- tests/bios-tables-test.c | 36 +++++++++++++----------------------- ui/spice-display.c | 14 ++++---------- 20 files changed, 39 insertions(+), 93 deletions(-) diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c index 4b55361..e9b6d21 100644 --- a/backends/hostmem-file.c +++ b/backends/hostmem-file.c @@ -83,9 +83,7 @@ static void set_mem_path(Object *o, const char *str, Error **errp) error_setg(errp, "cannot change property value"); return; } - if (fb->mem_path) { - g_free(fb->mem_path); - } + g_free(fb->mem_path); fb->mem_path = g_strdup(str); } diff --git a/bsd-user/elfload.c b/bsd-user/elfload.c index d067779..351aab1 100644 --- a/bsd-user/elfload.c +++ b/bsd-user/elfload.c @@ -1355,9 +1355,7 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, } } if (!bprm->p) { - if (elf_interpreter) { - free(elf_interpreter); - } + free(elf_interpreter); free (elf_phdata); close(bprm->fd); return -E2BIG; diff --git a/disas/sparc.c b/disas/sparc.c index f4e3565..59a1e36 100644 --- a/disas/sparc.c +++ b/disas/sparc.c @@ -2622,8 +2622,7 @@ build_hash_table (const sparc_opcode **opcode_table, memset (hash_table, 0, HASH_SIZE * sizeof (hash_table[0])); memset (hash_count, 0, HASH_SIZE * sizeof (hash_count[0])); - if (hash_buf != NULL) - free (hash_buf); + free(hash_buf); hash_buf = malloc (sizeof (* hash_buf) * num_opcodes); for (i = num_opcodes - 1; i >= 0; --i) { diff --git a/hw/bt/hci.c b/hw/bt/hci.c index 7ea3dc6..3fec435 100644 --- a/hw/bt/hci.c +++ b/hw/bt/hci.c @@ -1151,8 +1151,7 @@ static void bt_hci_reset(struct bt_hci_s *hci) hci->event_mask[7] = 0x00; hci->device.inquiry_scan = 0; hci->device.page_scan = 0; - if (hci->device.lmp_name) - g_free((void *) hci->device.lmp_name); + g_free((void *) hci->device.lmp_name); hci->device.lmp_name = NULL; hci->device.class[0] = 0x00; hci->device.class[1] = 0x00; @@ -1829,8 +1828,7 @@ static void bt_submit_hci(struct HCIInfo *info, case cmd_opcode_pack(OGF_HOST_CTL, OCF_CHANGE_LOCAL_NAME): LENGTH_CHECK(change_local_name); - if (hci->device.lmp_name) - g_free((void *) hci->device.lmp_name); + g_free((void *) hci->device.lmp_name); hci->device.lmp_name = g_strndup(PARAM(change_local_name, name), sizeof(PARAM(change_local_name, name))); bt_hci_event_complete_status(hci, HCI_SUCCESS); @@ -2231,8 +2229,7 @@ static void bt_hci_done(struct HCIInfo *info) bt_device_done(&hci->device); - if (hci->device.lmp_name) - g_free((void *) hci->device.lmp_name); + g_free((void *) hci->device.lmp_name); /* Be gentle and send DISCONNECT to all connected peers and those * currently waiting for us to accept or reject a connection request. diff --git a/hw/core/loader.c b/hw/core/loader.c index 216eeeb..a96a74e 100644 --- a/hw/core/loader.c +++ b/hw/core/loader.c @@ -594,8 +594,7 @@ static int load_uboot_image(const char *filename, hwaddr *ep, hwaddr *loadaddr, ret = hdr->ih_size; out: - if (data) - g_free(data); + g_free(data); close(fd); return ret; } diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c index 04fd80a..33e245e 100644 --- a/hw/core/qdev-properties.c +++ b/hw/core/qdev-properties.c @@ -422,9 +422,7 @@ static void set_string(Object *obj, Visitor *v, void *opaque, error_propagate(errp, local_err); return; } - if (*ptr) { - g_free(*ptr); - } + g_free(*ptr); *ptr = str; } diff --git a/hw/display/exynos4210_fimd.c b/hw/display/exynos4210_fimd.c index 603ef50..45239e8 100644 --- a/hw/display/exynos4210_fimd.c +++ b/hw/display/exynos4210_fimd.c @@ -1354,9 +1354,7 @@ static void exynos4210_fimd_reset(DeviceState *d) fimd_update_get_alpha(s, w); } - if (s->ifb != NULL) { - g_free(s->ifb); - } + g_free(s->ifb); s->ifb = NULL; exynos4210_fimd_invalidate(s); diff --git a/hw/mips/mips_r4k.c b/hw/mips/mips_r4k.c index f4dcacd..86b2c0b 100644 --- a/hw/mips/mips_r4k.c +++ b/hw/mips/mips_r4k.c @@ -252,9 +252,7 @@ void mips_r4k_init(MachineState *machine) fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n", bios_name); } - if (filename) { - g_free(filename); - } + g_free(filename); if (kernel_filename) { loaderparams.ram_size = ram_size; diff --git a/hw/net/fsl_etsec/rings.c b/hw/net/fsl_etsec/rings.c index 68e7b6d..0a5c6cf 100644 --- a/hw/net/fsl_etsec/rings.c +++ b/hw/net/fsl_etsec/rings.c @@ -464,9 +464,7 @@ static void rx_init_frame(eTSEC *etsec, const uint8_t *buf, size_t size) etsec->rx_fcb_size = 0; } - if (etsec->rx_buffer != NULL) { - g_free(etsec->rx_buffer); - } + g_free(etsec->rx_buffer); /* Do not copy the frame for now */ etsec->rx_buffer = (uint8_t *)buf; diff --git a/hw/net/rocker/rocker.c b/hw/net/rocker/rocker.c index 47d080f..7e7bda4 100644 --- a/hw/net/rocker/rocker.c +++ b/hw/net/rocker/rocker.c @@ -265,9 +265,7 @@ err_bad_io: err_no_mem: err_bad_attr: for (i = 0; i < ROCKER_TX_FRAGS_MAX; i++) { - if (iov[i].iov_base) { - g_free(iov[i].iov_base); - } + g_free(iov[i].iov_base); } return err; diff --git a/hw/net/rocker/rocker_desc.c b/hw/net/rocker/rocker_desc.c index 9d896fe..b5c0b4a 100644 --- a/hw/net/rocker/rocker_desc.c +++ b/hw/net/rocker/rocker_desc.c @@ -136,9 +136,7 @@ bool desc_ring_set_size(DescRing *ring, uint32_t size) } for (i = 0; i < ring->size; i++) { - if (ring->info[i].buf) { - g_free(ring->info[i].buf); - } + g_free(ring->info[i].buf); } ring->size = size; @@ -360,9 +358,7 @@ DescRing *desc_ring_alloc(Rocker *r, int index) void desc_ring_free(DescRing *ring) { - if (ring->info) { - g_free(ring->info); - } + g_free(ring->info); g_free(ring); } diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c index 88481b7..658f8c4 100644 --- a/hw/nvram/fw_cfg.c +++ b/hw/nvram/fw_cfg.c @@ -187,9 +187,7 @@ static void fw_cfg_bootsplash(FWCfgState *s) g_free(filename); return; } - if (boot_splash_filedata != NULL) { - g_free(boot_splash_filedata); - } + g_free(boot_splash_filedata); boot_splash_filedata = (uint8_t *)file_data; boot_splash_filedata_size = file_size; diff --git a/hw/pci-host/prep.c b/hw/pci-host/prep.c index c63f45d..988907b 100644 --- a/hw/pci-host/prep.c +++ b/hw/pci-host/prep.c @@ -328,9 +328,7 @@ static void raven_realize(PCIDevice *d, Error **errp) if (bios_size < 0 || bios_size > BIOS_SIZE) { hw_error("qemu: could not load bios image '%s'\n", s->bios_name); } - if (filename) { - g_free(filename); - } + g_free(filename); } } diff --git a/hw/sd/sd.c b/hw/sd/sd.c index a1ff465..3e2a451 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -412,8 +412,7 @@ static void sd_reset(SDState *sd) sd_set_cardstatus(sd); sd_set_sdstatus(sd); - if (sd->wp_groups) - g_free(sd->wp_groups); + g_free(sd->wp_groups); sd->wp_switch = sd->blk ? blk_is_read_only(sd->blk) : false; sd->wpgrps_size = sect; sd->wp_groups = bitmap_new(sd->wpgrps_size); diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index c673bed..1c57e20 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -1453,9 +1453,7 @@ static int xhci_ep_nuke_one_xfer(XHCITransfer *t, TRBCCode report) t->running_retry = 0; killed = 1; } - if (t->trbs) { - g_free(t->trbs); - } + g_free(t->trbs); t->trbs = NULL; t->trb_count = t->trb_alloced = 0; diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c index aca3790..4a5bc11 100644 --- a/hw/xen/xen_pt_config_init.c +++ b/hw/xen/xen_pt_config_init.c @@ -2081,9 +2081,7 @@ void xen_pt_config_delete(XenPCIPassthroughState *s) if (s->msix) { xen_pt_msix_delete(s); } - if (s->msi) { - g_free(s->msi); - } + g_free(s->msi); /* free all register group entry */ QLIST_FOREACH_SAFE(reg_group, &s->reg_grps, entries, next_grp) { diff --git a/migration/savevm.c b/migration/savevm.c index 6071215..33e55fe 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -551,9 +551,7 @@ void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) QTAILQ_FOREACH_SAFE(se, &savevm_state.handlers, entry, new_se) { if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { QTAILQ_REMOVE(&savevm_state.handlers, se, entry); - if (se->compat) { - g_free(se->compat); - } + g_free(se->compat); g_free(se->ops); g_free(se); } @@ -612,9 +610,7 @@ void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, QTAILQ_FOREACH_SAFE(se, &savevm_state.handlers, entry, new_se) { if (se->vmsd == vmsd && se->opaque == opaque) { QTAILQ_REMOVE(&savevm_state.handlers, se, entry); - if (se->compat) { - g_free(se->compat); - } + g_free(se->compat); g_free(se); } } diff --git a/qemu-char.c b/qemu-char.c index fa65159..dd83203 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -2710,9 +2710,7 @@ static int tcp_set_msgfds(CharDriverState *chr, int *fds, int num) TCPCharDriver *s = chr->opaque; /* clear old pending fd array */ - if (s->write_msgfds) { - g_free(s->write_msgfds); - } + g_free(s->write_msgfds); if (num) { s->write_msgfds = g_malloc(num * sizeof(int)); diff --git a/tests/bios-tables-test.c b/tests/bios-tables-test.c index 9686328..6d37332 100644 --- a/tests/bios-tables-test.c +++ b/tests/bios-tables-test.c @@ -161,31 +161,23 @@ static void free_test_data(test_data *data) AcpiSdtTable *temp; int i; - if (data->rsdt_tables_addr) { - g_free(data->rsdt_tables_addr); - } + g_free(data->rsdt_tables_addr); for (i = 0; i < data->tables->len; ++i) { temp = &g_array_index(data->tables, AcpiSdtTable, i); - if (temp->aml) { - g_free(temp->aml); - } - if (temp->aml_file) { - if (!temp->tmp_files_retain && - g_strstr_len(temp->aml_file, -1, "aml-")) { - unlink(temp->aml_file); - } - g_free(temp->aml_file); + g_free(temp->aml); + if (temp->aml_file && + !temp->tmp_files_retain && + g_strstr_len(temp->aml_file, -1, "aml-")) { + unlink(temp->aml_file); } - if (temp->asl) { - g_free(temp->asl); - } - if (temp->asl_file) { - if (!temp->tmp_files_retain) { - unlink(temp->asl_file); - } - g_free(temp->asl_file); + g_free(temp->aml_file); + g_free(temp->asl); + if (temp->asl_file && + !temp->tmp_files_retain) { + unlink(temp->asl_file); } + g_free(temp->asl_file); } g_array_free(data->tables, false); @@ -420,9 +412,7 @@ static void dump_aml_files(test_data *data, bool rebuild) close(fd); - if (aml_file) { - g_free(aml_file); - } + g_free(aml_file); } } diff --git a/ui/spice-display.c b/ui/spice-display.c index 0360abf..77c8cba 100644 --- a/ui/spice-display.c +++ b/ui/spice-display.c @@ -737,9 +737,7 @@ static void display_mouse_set(DisplayChangeListener *dcl, qemu_mutex_lock(&ssd->lock); ssd->ptr_x = x; ssd->ptr_y = y; - if (ssd->ptr_move) { - g_free(ssd->ptr_move); - } + g_free(ssd->ptr_move); ssd->ptr_move = qemu_spice_create_cursor_update(ssd, NULL, on); qemu_mutex_unlock(&ssd->lock); } @@ -752,13 +750,9 @@ static void display_mouse_define(DisplayChangeListener *dcl, qemu_mutex_lock(&ssd->lock); ssd->hot_x = c->hot_x; ssd->hot_y = c->hot_y; - if (ssd->ptr_move) { - g_free(ssd->ptr_move); - ssd->ptr_move = NULL; - } - if (ssd->ptr_define) { - g_free(ssd->ptr_define); - } + g_free(ssd->ptr_move); + ssd->ptr_move = NULL; + g_free(ssd->ptr_define); ssd->ptr_define = qemu_spice_create_cursor_update(ssd, c, 0); qemu_mutex_unlock(&ssd->lock); } -- cgit v1.1