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Commit d5108e69 authored by Parav Pandit's avatar Parav Pandit Committed by Jason Gunthorpe
Browse files

IB/rxe: Make counters thread safe 



Current rxe device counters are not thread safe.
When multiple QPs are used, they can be racy.
Make them thread safe by making it atomic64.

Fixes: 0b1e5b99 ("IB/rxe: Add port protocol stats")
Signed-off-by: default avatarParav Pandit <parav@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 6e3722ba

drivers/infiniband/sw/rxe/rxe_hw_counters.c

+1 −1
Original line number Diff line number Diff line
@@ -62,7 +62,7 @@ int rxe_ib_get_hw_stats(struct ib_device *ibdev, 
		return -EINVAL;



	for (cnt = 0; cnt  < ARRAY_SIZE(rxe_counter_name); cnt++)

		stats->value[cnt] = dev->stats_counters[cnt];

		stats->value[cnt] = atomic64_read(&dev->stats_counters[cnt]);



	return ARRAY_SIZE(rxe_counter_name);

}

drivers/infiniband/sw/rxe/rxe_verbs.h

+3 −3
Original line number Diff line number Diff line
@@ -409,16 +409,16 @@ struct rxe_dev { 
	spinlock_t		mmap_offset_lock; /* guard mmap_offset */

	int			mmap_offset;



	u64			stats_counters[RXE_NUM_OF_COUNTERS];

	atomic64_t		stats_counters[RXE_NUM_OF_COUNTERS];



	struct rxe_port		port;

	struct list_head	list;

	struct crypto_shash	*tfm;

};



static inline void rxe_counter_inc(struct rxe_dev *rxe, enum rxe_counters cnt)

static inline void rxe_counter_inc(struct rxe_dev *rxe, enum rxe_counters index)

{

	rxe->stats_counters[cnt]++;

	atomic64_inc(&rxe->stats_counters[index]);

}



static inline struct rxe_dev *to_rdev(struct ib_device *dev)