[PATCH] IB/core: Fix bit curruption in ib_device_cap_flags structure

[Max Gurtovoy <maxg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>]

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: fb532d6a79b9 ('IB/{core, ulp} Support above 32 possible device capability flags')
Reported-by: Robert LeBlanc <robert-4JaGZRWAfWbajFs6igw21g@public.gmane.org>
Cc: Stable <stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org> #[v4.6+]
Acked-by: Sagi Grimberg <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
Signed-off-by: Max Gurtovoy <maxg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Matan Barak <matanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
 include/rdma/ib_verbs.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 432bed5..c97357b 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -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),
-- 
1.7.1

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