This is a note to let you know that I've just added the patch titled RDMA/qedr: Fix doorbell setting to the 5.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: rdma-qedr-fix-doorbell-setting.patch and it can be found in the queue-5.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 15412817c34f9000f440c49774efa96deb85d69e Author: Michal Kalderon <michal.kalderon@xxxxxxxxxxx> Date: Wed Sep 2 19:57:35 2020 +0300 RDMA/qedr: Fix doorbell setting [ Upstream commit 0b1eddc1964351cd5ce57aff46853ed4ce9ebbff ] Change the doorbell setting so that the maximum value between the last and current value is set. This is to avoid doorbells being lost. Fixes: a7efd7773e31 ("qedr: Add support for PD,PKEY and CQ verbs") Link: https://lore.kernel.org/r/20200902165741.8355-3-michal.kalderon@xxxxxxxxxxx Signed-off-by: Michal Kalderon <michal.kalderon@xxxxxxxxxxx> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c index c6165c6390a71..7de96ac4ce543 100644 --- a/drivers/infiniband/hw/qedr/verbs.c +++ b/drivers/infiniband/hw/qedr/verbs.c @@ -998,7 +998,7 @@ int qedr_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, /* Generate doorbell address. */ cq->db.data.icid = cq->icid; cq->db_addr = dev->db_addr + db_offset; - cq->db.data.params = DB_AGG_CMD_SET << + cq->db.data.params = DB_AGG_CMD_MAX << RDMA_PWM_VAL32_DATA_AGG_CMD_SHIFT; /* point to the very last element, passing it we will toggle */