diff options
author | Zhu Lingshan <[email protected]> | 2021-05-08 15:11:52 +0800 |
---|---|---|
committer | Marc Zyngier <[email protected]> | 2021-05-15 10:26:55 +0100 |
commit | e44b49f623c77bee7451f1a82ccfb969c1028ae2 (patch) | |
tree | 6b5aef3e09c0e79ce5a53f488a02ae1ee7f155f9 | |
parent | 6efb943b8616ec53a5e444193dccf1af9ad627b5 (diff) |
Revert "irqbypass: do not start cons/prod when failed connect"
This reverts commit a979a6aa009f3c99689432e0cdb5402a4463fb88.
The reverted commit may cause VM freeze on arm64 with GICv4,
where stopping a consumer is implemented by suspending the VM.
Should the connect fail, the VM will not be resumed, which
is a bit of a problem.
It also erroneously calls the producer destructor unconditionally,
which is unexpected.
Reported-by: Shaokun Zhang <[email protected]>
Suggested-by: Marc Zyngier <[email protected]>
Acked-by: Jason Wang <[email protected]>
Acked-by: Michael S. Tsirkin <[email protected]>
Reviewed-by: Eric Auger <[email protected]>
Tested-by: Shaokun Zhang <[email protected]>
Signed-off-by: Zhu Lingshan <[email protected]>
[maz: tags and cc-stable, commit message update]
Signed-off-by: Marc Zyngier <[email protected]>
Fixes: a979a6aa009f ("irqbypass: do not start cons/prod when failed connect")
Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/r/[email protected]
Cc: [email protected]
-rw-r--r-- | virt/lib/irqbypass.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/virt/lib/irqbypass.c b/virt/lib/irqbypass.c index c9bb3957f58a..28fda42e471b 100644 --- a/virt/lib/irqbypass.c +++ b/virt/lib/irqbypass.c @@ -40,21 +40,17 @@ static int __connect(struct irq_bypass_producer *prod, if (prod->add_consumer) ret = prod->add_consumer(prod, cons); - if (ret) - goto err_add_consumer; - - ret = cons->add_producer(cons, prod); - if (ret) - goto err_add_producer; + if (!ret) { + ret = cons->add_producer(cons, prod); + if (ret && prod->del_consumer) + prod->del_consumer(prod, cons); + } if (cons->start) cons->start(cons); if (prod->start) prod->start(prod); -err_add_producer: - if (prod->del_consumer) - prod->del_consumer(prod, cons); -err_add_consumer: + return ret; } |