From f0654b8d917953dd64b37b9e12c82ffe9ff87041 Mon Sep 17 00:00:00 2001 From: Stefano Garzarella Date: Mon, 1 Jul 2024 09:52:08 +0200 Subject: virtio: remove virtio_tswap16s() call in vring_packed_event_read() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit d152cdd6f6 ("virtio: use virtio accessor to access packed event") switched using of address_space_read_cached() to virito_lduw_phys_cached() to access packed descriptor event. When we used address_space_read_cached(), we needed to call virtio_tswap16s() to handle the endianess of the field, but virito_lduw_phys_cached() already handles it internally, so we no longer need to call virtio_tswap16s() (as the commit had done for `off_wrap`, but forgot for `flags`). Fixes: d152cdd6f6 ("virtio: use virtio accessor to access packed event") Cc: jasowang@redhat.com Cc: qemu-stable@nongnu.org Reported-by: Xoykie Link: https://lore.kernel.org/qemu-devel/CAFU8RB_pjr77zMLsM0Unf9xPNxfr_--Tjr49F_eX32ZBc5o2zQ@mail.gmail.com Signed-off-by: Stefano Garzarella Message-Id: <20240701075208.19634-1-sgarzare@redhat.com> Acked-by: Jason Wang Reviewed-by: Peter Maydell Reviewed-by: Eugenio Pérez Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 7aa6492401e95fb296dec7cda81e67d91f6037d7) Signed-off-by: Michael Tokarev --- hw/virtio/virtio.c | 1 - 1 file changed, 1 deletion(-) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 4a35d7cb0c..1227e3d692 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -732,7 +732,6 @@ static void vring_packed_event_read(VirtIODevice *vdev, /* Make sure flags is seen before off_wrap */ smp_rmb(); e->off_wrap = virtio_lduw_phys_cached(vdev, cache, off_off); - virtio_tswap16s(vdev, &e->flags); } static void vring_packed_off_wrap_write(VirtIODevice *vdev, -- cgit v1.2.3