From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Rusty Russell <rusty@rustcorp.com.au>,
virtualization@lists.linux-foundation.org,
linux-scsi@vger.kernel.org, linux-s390@vger.kernel.org,
v9fs-developer@lists.sourceforge.net, netdev@vger.kernel.org,
kvm@vger.kernel.org, Amit Shah <amit.shah@redhat.com>,
Cornelia Huck <cornelia.huck@de.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
"David S. Miller" <davem@davemloft.net>,
Paolo Bonzini <pbonzini@redhat.com>,
"James E.J. Bottomley" <JBottomley@parallels.com>
Subject: [PATCH v4 21/25] virito_scsi: use freezable WQ for events
Date: Mon, 13 Oct 2014 10:51:29 +0300 [thread overview]
Message-ID: <1413114332-626-22-git-send-email-mst-v4@redhat.com> (raw)
In-Reply-To: <1413114332-626-1-git-send-email-mst-v4@redhat.com>
From: Paolo Bonzini <pbonzini@redhat.com>
Michael S. Tsirkin noticed a race condition:
we reset device on freeze, but system WQ is still
running so it might try adding bufs to a VQ meanwhile.
To fix, switch to handling events from the freezable WQ.
Reported-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
drivers/scsi/virtio_scsi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index 2b565b3..501838d 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -390,7 +390,7 @@ static void virtscsi_complete_event(struct virtio_scsi *vscsi, void *buf)
{
struct virtio_scsi_event_node *event_node = buf;
- schedule_work(&event_node->work);
+ queue_work(system_freezable_wq, &event_node->work);
}
static void virtscsi_event_done(struct virtqueue *vq)
--
MST
next prev parent reply other threads:[~2014-10-13 7:51 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-13 7:48 [PATCH v4 00/25] virtio: fix spec compliance issues Michael S. Tsirkin
2014-10-13 7:48 ` [PATCH v4 01/25] virtio_pci: fix virtio spec compliance on restore Michael S. Tsirkin
2014-10-13 7:48 ` [PATCH v4 02/25] virtio: unify config_changed handling Michael S. Tsirkin
2014-10-13 7:48 ` [PATCH v4 03/25] virtio-pci: move freeze/restore to virtio core Michael S. Tsirkin
2014-10-15 7:05 ` Paul Bolle
2014-10-13 7:50 ` [PATCH v4 04/25] virtio: defer config changed notifications Michael S. Tsirkin
2014-10-14 0:31 ` Rusty Russell
2014-10-14 8:59 ` Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 05/25] virtio_blk: drop config_enable Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 06/25] virtio-blk: drop config_mutex Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 07/25] virtio_net: drop config_enable Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 08/25] virtio-net: drop config_mutex Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 09/25] virtio_net: minor cleanup Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 10/25] virtio: add API to enable VQs early Michael S. Tsirkin
2014-11-11 0:45 ` Andy Grover
2014-11-11 6:15 ` Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 11/25] virtio_net: " Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 12/25] virtio_blk: " Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 13/25] virtio_console: " Michael S. Tsirkin
2014-10-20 12:07 ` Thomas Graf
2014-10-20 12:42 ` Cornelia Huck
2014-10-20 13:10 ` Thomas Graf
2014-10-20 13:35 ` Michael S. Tsirkin
2014-10-20 14:04 ` Michael S. Tsirkin
2014-10-20 14:44 ` Thomas Graf
2014-10-20 13:10 ` Michael S. Tsirkin
2014-10-20 13:12 ` Thomas Graf
2014-10-20 13:14 ` Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 14/25] 9p/trans_virtio: " Michael S. Tsirkin
2014-10-13 7:50 ` [PATCH v4 15/25] virtio_net: fix use after free on allocation failure Michael S. Tsirkin
2014-10-13 7:51 ` [PATCH v4 16/25] virtio_scsi: move kick event out from virtscsi_init Michael S. Tsirkin
2014-10-13 7:51 ` [PATCH v4 17/25] virtio_blk: enable VQs early on restore Michael S. Tsirkin
2014-10-13 7:51 ` [PATCH v4 18/25] virtio_scsi: " Michael S. Tsirkin
2014-10-13 7:51 ` [PATCH v4 19/25] virtio_console: " Michael S. Tsirkin
2014-10-13 7:51 ` [PATCH v4 20/25] virtio_net: " Michael S. Tsirkin
2014-10-13 7:51 ` Michael S. Tsirkin [this message]
2014-10-13 7:51 ` [PATCH v4 22/25] virtio_scsi: fix race on device removal Michael S. Tsirkin
2014-10-13 7:51 ` [PATCH v4 23/25] virtio_balloon: enable VQs early on restore Michael S. Tsirkin
2014-10-13 7:51 ` [PATCH v4 24/25] virtio_scsi: drop scan callback Michael S. Tsirkin
2014-10-13 7:51 ` [PATCH v4 25/25] virtio-rng: refactor probe error handling Michael S. Tsirkin
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