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linux/drivers/vhost
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Stefano Garzarella 7aed44babc vringh: don't use vringh_kiov_advance() in vringh_iov_xfer() 
In the while loop of vringh_iov_xfer(), `partlen` could be 0 if one of
the `iov` has 0 lenght.
In this case, we should skip the iov and go to the next one.
But calling vringh_kiov_advance() with 0 lenght does not cause the
advancement, since it returns immediately if asked to advance by 0 bytes.

Let's restore the code that was there before commit b8c06ad4d6
("vringh: implement vringh_kiov_advance()"), avoiding using
vringh_kiov_advance().

Fixes: b8c06ad4d6 ("vringh: implement vringh_kiov_advance()")
Cc: stable@vger.kernel.org
Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
History 2023-10-04 08:26:48 +01:00
..
iotlb.c vhost_iotlb: split out IOTLB initialization 2022-05-31 12:44:28 -04:00
Kconfig vhost_task: Allow vhost layer to use copy_process 2023-03-23 12:45:36 +01:00
Makefile vhost: introduce vDPA-based backend 2020-04-02 10:41:40 -04:00
net.c vhost: convert poll work to be vq based 2023-07-03 12:15:13 -04:00
scsi.c vhost-scsi: Rename vhost_scsi_iov_to_sgl 2023-08-10 15:24:28 -04:00
test.c vhost-test: remove meaningless debug info 2023-02-20 19:26:58 -05:00
test.h tools/virtio: Add --reset 2020-06-22 12:34:21 -04:00
vdpa.c vdpa: add get_backend_features vdpa operation 2023-09-03 18:10:22 -04:00
vhost.c vhost: Allow worker switching while work is queueing 2023-07-03 12:15:14 -04:00
vhost.h vhost: Make parameter name match of vhost_get_vq_desc() 2023-07-03 12:15:15 -04:00
vringh.c vringh: don't use vringh_kiov_advance() in vringh_iov_xfer() 2023-10-04 08:26:48 +01:00
vsock.c vhost_sock: convert to vhost_vq_work_queue 2023-07-03 12:15:13 -04:00