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| author | Ira Gusinsky <irenag@mellanox.com> | 2015-04-02 17:07:27 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-04-02 16:33:41 -0400 |
| commit | 21db507439ec3a76a9587f2ad50ad3e4d13f4440 (patch) | |
| tree | 8bfdc9ae335f89de7f7219a1273341d224d9733e | |
| parent | 05e4ecd1dc8b085a9010f20dcb5409b25488480a (diff) | |
| download | linux-stable-21db507439ec3a76a9587f2ad50ad3e4d13f4440.tar.gz linux-stable-21db507439ec3a76a9587f2ad50ad3e4d13f4440.tar.bz2 linux-stable-21db507439ec3a76a9587f2ad50ad3e4d13f4440.zip | |
net/mlx5_core: Avoid usage command work entry after writing command doorbell
Avoid usage of command work entry in cmd_work_handler since it can be released
by mlx5_cmd_invoke before the work handler returns to running.
Signed-off-by: Ira Gusinsky <irenag@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c index 290ae87fdef7..0d862696b876 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -515,10 +515,11 @@ static void cmd_work_handler(struct work_struct *work) ent->ts1 = ktime_get_ns(); /* ring doorbell after the descriptor is valid */ + mlx5_core_dbg(dev, "writing 0x%x to command doorbell\n", 1 << ent->idx); wmb(); iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell); - mlx5_core_dbg(dev, "write 0x%x to command doorbell\n", 1 << ent->idx); mmiowb(); + /* if not in polling don't use ent after this point */ if (cmd->mode == CMD_MODE_POLLING) { poll_timeout(ent); /* make sure we read the descriptor after ownership is SW */ |