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maint: avoid useless "if (foo) free(foo)" pattern

Browse Source 
My Coccinelle semantic patch finds a few more, because it also fixes up
the equally pointless conditional

    if (foo) {
        free(foo);
        foo = NULL;
    }

Result (feel free to squash it into your patch):

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Markus Armbruster 2015-08-26 14:02:53 +02:00 committed by Michael Tokarev
parent ef1e1e0782
commit 012aef0734
9 changed files with 20 additions and 40 deletions
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6
hw/char/exynos4210_uart.c
View File

@ -234,10 +234,8 @@ static int fifo_empty_elements_number(Exynos4210UartFIFO *q)
static void fifo_reset(Exynos4210UartFIFO *q)
{
if (q->data != NULL) {
g_free(q->data);
q->data = NULL;
}
g_free(q->data);
q->data = NULL;
q->data = (uint8_t *)g_malloc0(q->size);

6
hw/net/rtl8139.c
View File

@ -3391,10 +3391,8 @@ static void pci_rtl8139_uninit(PCIDevice *dev)
{
RTL8139State *s = RTL8139(dev);
if (s->cplus_txbuffer) {
g_free(s->cplus_txbuffer);
s->cplus_txbuffer = NULL;
}
g_free(s->cplus_txbuffer);
s->cplus_txbuffer = NULL;
timer_del(s->timer);
timer_free(s->timer);
qemu_del_nic(s->nic);

12
hw/ppc/spapr_pci.c
View File

@ -1460,10 +1460,8 @@ static void spapr_pci_pre_save(void *opaque)
gpointer key, value;
int i;
if (sphb->msi_devs) {
g_free(sphb->msi_devs);
sphb->msi_devs = NULL;
}
g_free(sphb->msi_devs);
sphb->msi_devs = NULL;
sphb->msi_devs_num = g_hash_table_size(sphb->msi);
if (!sphb->msi_devs_num) {
return;
@ -1490,10 +1488,8 @@ static int spapr_pci_post_load(void *opaque, int version_id)
sizeof(sphb->msi_devs[i].value));
g_hash_table_insert(sphb->msi, key, value);
}
if (sphb->msi_devs) {
g_free(sphb->msi_devs);
sphb->msi_devs = NULL;
}
g_free(sphb->msi_devs);
sphb->msi_devs = NULL;
sphb->msi_devs_num = 0;
return 0;

6
hw/sd/sdhci.c
View File

@ -1169,10 +1169,8 @@ static void sdhci_uninitfn(SDHCIState *s)
qemu_free_irq(s->eject_cb);
qemu_free_irq(s->ro_cb);
if (s->fifo_buffer) {
g_free(s->fifo_buffer);
s->fifo_buffer = NULL;
}
g_free(s->fifo_buffer);
s->fifo_buffer = NULL;
}
const VMStateDescription sdhci_vmstate = {

6
hw/usb/hcd-ehci-pci.c
View File

@ -95,10 +95,8 @@ static void usb_ehci_pci_exit(PCIDevice *dev)
usb_ehci_unrealize(s, DEVICE(dev), NULL);
if (s->irq) {
g_free(s->irq);
s->irq = NULL;
}
g_free(s->irq);
s->irq = NULL;
}
static void usb_ehci_pci_reset(DeviceState *dev)

6
tests/test-hbitmap.c
View File

@ -139,10 +139,8 @@ static void hbitmap_test_teardown(TestHBitmapData *data,
hbitmap_free(data->hb);
data->hb = NULL;
}
if (data->bits) {
g_free(data->bits);
data->bits = NULL;
}
g_free(data->bits);
data->bits = NULL;
}
/* Set a range in the HBitmap and in the shadow "simple" bitmap.

6
translate-all.c
View File

@ -731,10 +731,8 @@ void tb_free(TranslationBlock *tb)
static inline void invalidate_page_bitmap(PageDesc *p)
{
if (p->code_bitmap) {
g_free(p->code_bitmap);
p->code_bitmap = NULL;
}
g_free(p->code_bitmap);
p->code_bitmap = NULL;
p->code_write_count = 0;
}

6
vl.c
View File

@ -534,10 +534,8 @@ const char *qemu_get_vm_name(void)
static void res_free(void)
{
if (boot_splash_filedata != NULL) {
g_free(boot_splash_filedata);
boot_splash_filedata = NULL;
}
g_free(boot_splash_filedata);
boot_splash_filedata = NULL;
}
static int default_driver_check(void *opaque, QemuOpts *opts, Error **errp)

6
xen-mapcache.c
View File

@ -169,10 +169,8 @@ static void xen_remap_bucket(MapCacheEntry *entry,
exit(-1);
}
}
if (entry->valid_mapping != NULL) {
g_free(entry->valid_mapping);
entry->valid_mapping = NULL;
}
g_free(entry->valid_mapping);
entry->valid_mapping = NULL;
for (i = 0; i < nb_pfn; i++) {
pfns[i] = (address_index << (MCACHE_BUCKET_SHIFT-XC_PAGE_SHIFT)) + i;