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ivshmem: Failed realize() can leave migration blocker behind 

If pci_ivshmem_realize() fails after it created its migration blocker,
the blocker is left in place.  Fix that by creating it last.

Likewise, if it fails after it called fifo8_create(), it leaks fifo
memory.  Fix that the same way.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1458066895-20632-18-git-send-email-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2016-03-15 19:34:32 +01:00
parent 9cf70c5225
commit d855e27565
1 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
hw/misc/ivshmem.c
View File

@ -825,6 +825,7 @@ static void ivshmem_write_config(PCIDevice *pdev, uint32_t address,
static void pci_ivshmem_realize(PCIDevice *dev, Error **errp)
{
IVShmemState *s = IVSHMEM(dev);
Error *err = NULL;
uint8_t *pci_conf;
uint8_t attr = PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_PREFETCH;
@ -856,8 +857,6 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp)
s->ivshmem_size = size;
}
fifo8_create(&s->incoming_fifo, sizeof(int64_t));
/* IRQFD requires MSI */
if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) &&
!ivshmem_has_feature(s, IVSHMEM_MSI)) {
@ -879,12 +878,6 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp)
s->role_val = IVSHMEM_MASTER; /* default */
}
if (s->role_val == IVSHMEM_PEER) {
error_setg(&s->migration_blocker,
"Migration is disabled when using feature 'peer mode' in device 'ivshmem'");
migrate_add_blocker(s->migration_blocker);
}
pci_conf = dev->config;
pci_conf[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
@ -963,7 +956,19 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp)
return;
}
create_shared_memory_BAR(s, fd, attr, errp);
create_shared_memory_BAR(s, fd, attr, &err);
if (err) {
error_propagate(errp, err);
return;
}
}
fifo8_create(&s->incoming_fifo, sizeof(int64_t));
if (s->role_val == IVSHMEM_PEER) {
error_setg(&s->migration_blocker,
"Migration is disabled when using feature 'peer mode' in device 'ivshmem'");
migrate_add_blocker(s->migration_blocker);
}
}