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(parent: e89de1c) | 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 18:03:15 +0000 (20:03 +0200)
commit43b9a552bbdf0dd00b110f34ffc79134e25ea423
tree3fbd9854afd69546cdcf0f2a50facaeed5e745dctree | snapshot
parente89de1cd85b660c34ec66993b2022081773db32bcommit | 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 | history
wrapfs-5.16.y