diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2019-12-06 05:53:53 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-01-08 20:16:01 +0300 |
| commit | bbfdafa860bb41344fad8fea06b78c74ec79e181 (patch) | |
| tree | 978cd12f2850bb1f61e35c25068df4243684a0b6 /virt/lib | |
| parent | 8262fe85b4edc5fb3dd7b9520bf5c6b4f027fa55 (diff) | |
| download | linux-bbfdafa860bb41344fad8fea06b78c74ec79e181.tar.xz | |
KVM: lib: use jump label to handle resource release in irq_bypass_register_producer()
Use out_err jump label to handle resource release. It's a
good practice to release resource in one place and help
eliminate some duplicated code.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt/lib')
| -rw-r--r-- | virt/lib/irqbypass.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/virt/lib/irqbypass.c b/virt/lib/irqbypass.c index cb0c801b3bc2..28fda42e471b 100644 --- a/virt/lib/irqbypass.c +++ b/virt/lib/irqbypass.c @@ -85,6 +85,7 @@ int irq_bypass_register_producer(struct irq_bypass_producer *producer) { struct irq_bypass_producer *tmp; struct irq_bypass_consumer *consumer; + int ret; if (!producer->token) return -EINVAL; @@ -98,20 +99,16 @@ int irq_bypass_register_producer(struct irq_bypass_producer *producer) list_for_each_entry(tmp, &producers, node) { if (tmp->token == producer->token) { - mutex_unlock(&lock); - module_put(THIS_MODULE); - return -EBUSY; + ret = -EBUSY; + goto out_err; } } list_for_each_entry(consumer, &consumers, node) { if (consumer->token == producer->token) { - int ret = __connect(producer, consumer); - if (ret) { - mutex_unlock(&lock); - module_put(THIS_MODULE); - return ret; - } + ret = __connect(producer, consumer); + if (ret) + goto out_err; break; } } @@ -121,6 +118,10 @@ int irq_bypass_register_producer(struct irq_bypass_producer *producer) mutex_unlock(&lock); return 0; +out_err: + mutex_unlock(&lock); + module_put(THIS_MODULE); + return ret; } EXPORT_SYMBOL_GPL(irq_bypass_register_producer); |