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| author | Markus Armbruster <armbru@redhat.com> | 2016-03-15 19:34:32 +0100 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2016-03-21 21:29:00 +0100 |
| commit | d855e2756554583b2b041c9e0a8381bdd202cbc3 (patch) | |
| tree | 22ba6784d3247766be3bb1fd836fe39476c7f5c8 /hw/misc/ivshmem.c | |
| parent | 9cf70c52253ccadc137d40eb0de2c0f25a127334 (diff) | |
| download | qemu-d855e2756554583b2b041c9e0a8381bdd202cbc3.tar.gz qemu-d855e2756554583b2b041c9e0a8381bdd202cbc3.tar.bz2 qemu-d855e2756554583b2b041c9e0a8381bdd202cbc3.zip | |
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>
Diffstat (limited to 'hw/misc/ivshmem.c')
| -rw-r--r-- | hw/misc/ivshmem.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c index 299cf5bda2..51ad255857 100644 --- a/hw/misc/ivshmem.c +++ b/hw/misc/ivshmem.c @@ -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); } } |