sfc: Do not free an empty page_ring

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

Fixes: 2768935a46 ("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>

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Martin Habets 2022-04-04 11:48:51 +01:00 • committed by David S. Miller

parent 2baed4f9b0

commit 458f5d92df

1 changed files with 3 additions and 0 deletions

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drivers/net/ethernet/sfc/rx_common.c

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