If you create MRs more than 0x10000 times after loading the module,
responder starts to reply NAKs for RDMA/Atomic operations because of rkey
violation detected in check_rkey(). The root cause is that rkeys are
incremented each time a new MR is created and the value overflows into the
range reserved for MWs.
Fixes: 0994a1bcd5f7 ("RDMA/rxe: Bump up default maximum values used via uverbs")
Signed-off-by: Daisuke Matsuda <matsuda-daisuke@xxxxxxxxxxx>
---
drivers/infiniband/sw/rxe/rxe_param.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_param.h b/drivers/infiniband/sw/rxe/rxe_param.h
index a754fc902e3d..a3d31bd45895 100644
--- a/drivers/infiniband/sw/rxe/rxe_param.h
+++ b/drivers/infiniband/sw/rxe/rxe_param.h
@@ -98,10 +98,10 @@ enum rxe_device_param {
RXE_MAX_SRQ = DEFAULT_MAX_VALUE - RXE_MIN_SRQ_INDEX,
RXE_MIN_MR_INDEX = 0x00000001,
- RXE_MAX_MR_INDEX = DEFAULT_MAX_VALUE,
- RXE_MAX_MR = DEFAULT_MAX_VALUE - RXE_MIN_MR_INDEX,
- RXE_MIN_MW_INDEX = 0x00010001,
- RXE_MAX_MW_INDEX = 0x00020000,
+ RXE_MAX_MR_INDEX = DEFAULT_MAX_VALUE >> 1,
+ RXE_MAX_MR = 0x00001000,
+ RXE_MIN_MW_INDEX = (DEFAULT_MAX_VALUE >> 1) + 1,
+ RXE_MAX_MW_INDEX = DEFAULT_MAX_VALUE,
RXE_MAX_MW = 0x00001000,
RXE_MAX_PKT_PER_ACK = 64,
--
2.31.1
