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sfc: Do not free an empty page_ring
authorMartin Habets <habetsm.xilinx@gmail.com>
Mon, 4 Apr 2022 10:48:51 +0000 (11:48 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 4 Apr 2022 11:53:52 +0000 (12:53 +0100)
commit458f5d92df4807e2a7c803ed928369129996bf96
treeb39ba87efdb8e6a849d3ed1cdf61263120beefd2tree
parent2baed4f9b085724a8a34add832d4763f3d83f877commit | diff
sfc: Do not free an empty page_ring

When the page_ring is not used page_ptr_mask is 0.
Do not dereference page_ring[0] in this case.

Fixes: 2768935a4660 ("sfc: reuse pages to avoid DMA mapping/unmapping costs")
Reported-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/sfc/rx_common.c diff | blob | history
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