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(parent: 926363c) | patch
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)
commit978971df82840b37a6a72fbbcf1966e3d577b88a
treeb39ba87efdb8e6a849d3ed1cdf61263120beefd2tree | snapshot
parent926363c7ad3e99a7dd26e4ed242ae3aff261c610commit | 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: d42cac8fb5e1 ("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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