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IB/core: Fix bit curruption in ib_device_cap_flags structure

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ib_device_cap_flags 64-bit expansion caused caps overlapping
and made consumers read wrong device capabilities. For example
IB_DEVICE_SG_GAPS_REG was falsely read by the iser driver causing
it to use a non-existing capability. This happened because signed
int becomes sign extended when converted it to u64. Fix this by
casting IB_DEVICE_ON_DEMAND_PAGING enumeration to ULL.

Fixes: f5aa9159a4 ('IB/core: Add arbitrary sg_list support')
Reported-by: Robert LeBlanc <[email protected]>
Cc: Stable <[email protected]> #[v4.6+]
Acked-by: Sagi Grimberg <[email protected]>
Signed-off-by: Max Gurtovoy <[email protected]>
Signed-off-by: Matan Barak <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
This commit is contained in:
Max Gurtovoy 2016-06-06 19:34:39 +03:00 • committed by Doug Ledford
commit 47355b3cd7
1 changed files with 1 additions and 1 deletions
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2
include/rdma/ib_verbs.h
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@ -217,7 +217,7 @@ enum ib_device_cap_flags {
IB_DEVICE_CROSS_CHANNEL = (1 << 27),
IB_DEVICE_MANAGED_FLOW_STEERING = (1 << 29),
IB_DEVICE_SIGNATURE_HANDOVER = (1 << 30),
IB_DEVICE_ON_DEMAND_PAGING = (1 << 31),
IB_DEVICE_ON_DEMAND_PAGING = (1ULL << 31),
IB_DEVICE_SG_GAPS_REG = (1ULL << 32),
IB_DEVICE_VIRTUAL_FUNCTION = ((u64)1 << 33),
IB_DEVICE_RAW_SCATTER_FCS = ((u64)1 << 34),