[PATCH 4.14 096/237] RDMA/rxe: Fix error type of mmap_offset

Greg Kroah-Hartman
2020-02-27T13:56:17Z

From: Jiewei Ke <kejiewei.cn@gmail.com>

[ Upstream commit 6ca18d8927d468c763571f78c9a7387a69ffa020 ]

The type of mmap_offset should be u64 instead of int to match the type of
mminfo.offset. If otherwise, after we create several thousands of CQs, it
will run into overflow issues.

Link: https://lore.kernel.org/r/20191227113613.5020-1-kejiewei.cn@gmail.com
Signed-off-by: Jiewei Ke <kejiewei.cn@gmail.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/sw/rxe/rxe_verbs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h
index d1cc89f6f2e33..46c8a66731e6c 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.h
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.h
@@ -408,7 +408,7 @@ struct rxe_dev {
struct list_head pending_mmaps;

spinlock_t mmap_offset_lock; /* guard mmap_offset */
- int mmap_offset;
+ u64 mmap_offset;

atomic64_t stats_counters[RXE_NUM_OF_COUNTERS];

--
2.20.1