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ivshmem: shmfd can be 0 

0 is a valid fd value, so change conditions and set -1 value early

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
This commit is contained in:
Marc-André Lureau 2015-06-23 12:53:42 +02:00
parent 1f8552df2c
commit 86d471bfa4
1 changed files with 3 additions and 3 deletions
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6
hw/misc/ivshmem.c
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@ -233,7 +233,7 @@ static uint64_t ivshmem_io_read(void *opaque, hwaddr addr,
case IVPOSITION:
/* return my VM ID if the memory is mapped */
if (s->shm_fd > 0) {
if (s->shm_fd >= 0) {
ret = s->vm_id;
} else {
ret = -1;
@ -665,6 +665,8 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp)
PCI_BASE_ADDRESS_MEM_PREFETCH;
Error *local_err = NULL;
s->shm_fd = -1;
if (s->sizearg == NULL) {
s->ivshmem_size = 4 << 20; /* 4 MB default */
} else {
@ -709,8 +711,6 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp)
pci_config_set_interrupt_pin(pci_conf, 1);
s->shm_fd = 0;
memory_region_init_io(&s->ivshmem_mmio, OBJECT(s), &ivshmem_mmio_ops, s,
"ivshmem-mmio", IVSHMEM_REG_BAR_SIZE);