From: Pankaj Gupta <pagupta@redhat.com>
To: amit@kernel.org, mst@redhat.com
Cc: arnd@arndb.de, gregkh@linuxfoundation.org,
virtualization@lists.linux-foundation.org, jasowang@redhat.com,
linux-kernel@vger.kernel.org, pagupta@redhat.com
Subject: [PATCH v2 2/2] virtio_ring: packed ring: fix virtqueue_detach_unused_buf
Date: Thu, 8 Aug 2019 17:06:06 +0530 [thread overview]
Message-ID: <20190808113606.19504-3-pagupta@redhat.com> (raw)
In-Reply-To: <20190808113606.19504-1-pagupta@redhat.com>
This patch makes packed ring code compatible with split ring in function
'virtqueue_detach_unused_buf_*'.
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
---
drivers/virtio/virtio_ring.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index c8be1c4f5b55..1b98a6777b7e 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1534,6 +1534,11 @@ static void *virtqueue_detach_unused_buf_packed(struct virtqueue *_vq)
for (i = 0; i < vq->packed.vring.num; i++) {
if (!vq->packed.desc_state[i].data)
continue;
+ vq->packed.next_avail_idx--;
+ if (vq->packed.next_avail_idx < 0) {
+ vq->packed.next_avail_idx = vq->packed.vring.num - 1;
+ vq->packed.avail_wrap_counter ^= 1;
+ }
/* detach_buf clears data, so grab it now. */
buf = vq->packed.desc_state[i].data;
detach_buf_packed(vq, i, NULL);
--
2.21.0
next prev parent reply other threads:[~2019-08-08 11:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 11:36 [PATCH v2 0/2] virtio_console: fix replug of virtio console port Pankaj Gupta
2019-08-08 11:36 ` [PATCH v2 1/2] virtio_console: free unused buffers with port delete Pankaj Gupta
2019-08-08 11:55 ` Greg KH
2019-08-08 12:19 ` Pankaj Gupta
2019-08-08 11:36 ` Pankaj Gupta [this message]
2019-08-08 11:56 ` [PATCH v2 2/2] virtio_ring: packed ring: fix virtqueue_detach_unused_buf Greg KH
2019-08-08 12:28 ` Pankaj Gupta
2019-08-08 12:42 ` Greg KH
2019-08-08 12:44 ` Pankaj Gupta
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