diff options
| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2023-09-27 13:52:46 +0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-10-15 11:49:57 -0700 |
| commit | 5720c43d5216b5dbd9ab25595f7c61e55d36d4fc (patch) | |
| tree | 1a29a9fd69ded0883431ba38d619ffeb960c5b6e /arch/x86/kernel/smpboot.c | |
| parent | 11d3f72613957cba0783938a1ceddffe7dbbf5a1 (diff) | |
virtio_net: fix the missing of the dma cpu sync
Commit 295525e29a5b ("virtio_net: merge dma operations when filling
mergeable buffers") unmaps the buffer with DMA_ATTR_SKIP_CPU_SYNC when
the dma->ref is zero. We do that with DMA_ATTR_SKIP_CPU_SYNC, because we
do not want to do the sync for the entire page_frag. But that misses the
sync for the current area.
This patch does cpu sync regardless of whether the ref is zero or not.
Fixes: 295525e29a5b ("virtio_net: merge dma operations when filling mergeable buffers")
Reported-by: Michael Roth <michael.roth@amd.com>
Closes: http://lore.kernel.org/all/20230926130451.axgodaa6tvwqs3ut@amd.com
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
0 files changed, 0 insertions, 0 deletions