[PATCH 5.4 24/65] RDMA/counter: Query a counter before release

[Greg Kroah-Hartman]

From: Mark Zhang <markz@xxxxxxxxxxxx>

[ Upstream commit c1d869d64a1955817c4d6fff08ecbbe8e59d36f8 ]

Query a dynamically-allocated counter before release it, to update it's
hwcounters and log all of them into history data. Otherwise all values of
these hwcounters will be lost.

Fixes: f34a55e497e8 ("RDMA/core: Get sum value of all counters when perform a sysfs stat read")
Link: https://lore.kernel.org/r/20200621110000.56059-1-leon@xxxxxxxxxx
Signed-off-by: Mark Zhang <markz@xxxxxxxxxxxx>
Reviewed-by: Maor Gottlieb <maorg@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/infiniband/core/counters.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/counters.c b/drivers/infiniband/core/counters.c
index 46dd50ff7c85a..11210bf7fd61b 100644
--- a/drivers/infiniband/core/counters.c
+++ b/drivers/infiniband/core/counters.c
@@ -195,7 +195,7 @@ static int __rdma_counter_unbind_qp(struct ib_qp *qp)
 	return ret;
 }
 
-static void counter_history_stat_update(const struct rdma_counter *counter)
+static void counter_history_stat_update(struct rdma_counter *counter)
 {
 	struct ib_device *dev = counter->device;
 	struct rdma_port_counter *port_counter;
@@ -205,6 +205,8 @@ static void counter_history_stat_update(const struct rdma_counter *counter)
 	if (!port_counter->hstats)
 		return;
 
+	rdma_counter_query_stats(counter);
+
 	for (i = 0; i < counter->stats->num_counters; i++)
 		port_counter->hstats->value[i] += counter->stats->value[i];
 }
-- 
2.25.1