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Commit 130a1a9a authored by Guangguan Wang's avatar Guangguan Wang Committed by Greg Kroah-Hartman
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net/smc: set rmb's SG_MAX_SINGLE_ALLOC limitation only when CONFIG_ARCH_NO_SG_CHAIN is defined



[ Upstream commit 3ac14b9dfbd345e891d48d89f6c2fa519848f0f4 ]

SG_MAX_SINGLE_ALLOC is used to limit maximum number of entries that
will be allocated in one piece of scatterlist. When the entries of
scatterlist exceeds SG_MAX_SINGLE_ALLOC, sg chain will be used. From
commit 7c703e54 ("arch: switch the default on ARCH_HAS_SG_CHAIN"),
we can know that the macro CONFIG_ARCH_NO_SG_CHAIN is used to identify
whether sg chain is supported. So, SMC-R's rmb buffer should be limited
by SG_MAX_SINGLE_ALLOC only when the macro CONFIG_ARCH_NO_SG_CHAIN is
defined.

Fixes: a3fe3d01 ("net/smc: introduce sg-logic for RMBs")
Signed-off-by: default avatarGuangguan Wang <guangguan.wang@linux.alibaba.com>
Co-developed-by: default avatarWen Gu <guwen@linux.alibaba.com>
Signed-off-by: default avatarWen Gu <guwen@linux.alibaba.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 33749ad4
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