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(parent: 0ac7416) | 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)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 13 Apr 2022 19:01:05 +0000 (21:01 +0200)
commitd8992b393f974b47c4a72b9bacdbfc4110e29eea
tree43097ea7acf54bd1895cba3532451dc30e93ebc8tree
parent0ac74169ebc34686a6ef2a033473a4913aa3e471commit | diff
sfc: Do not free an empty page_ring

[ Upstream commit 458f5d92df4807e2a7c803ed928369129996bf96 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/net/ethernet/sfc/rx_common.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)