https://github.com/torvalds/linux
Revision f915b75bffb7257bd8d26376b8e1cc67771927f8 authored by Yunsheng Lin on 17 November 2021, 07:56:52 UTC, committed by David S. Miller on 18 November 2021, 11:29:40 UTC
This reverts commit d00e60ee54b12de945b8493cf18c1ada9e422514.

As reported by Guillaume in [1]:
Enabling LPAE always enables CONFIG_ARCH_DMA_ADDR_T_64BIT
in 32-bit systems, which breaks the bootup proceess when a
ethernet driver is using page pool with PP_FLAG_DMA_MAP flag.
As we were hoping we had no active consumers for such system
when we removed the dma mapping support, and LPAE seems like
a common feature for 32 bits system, so revert it.

1. https://www.spinics.net/lists/netdev/msg779890.html

Fixes: d00e60ee54b1 ("page_pool: disable dma mapping support for 32-bit arch with 64-bit DMA")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Tested-by: "kernelci.org bot" <bot@kernelci.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent a66998e
History
Tip revision: f915b75bffb7257bd8d26376b8e1cc67771927f8 authored by Yunsheng Lin on 17 November 2021, 07:56:52 UTC
page_pool: Revert "page_pool: disable dma mapping support..."
Tip revision: f915b75
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