diff options
| author | Xiaoliang Yang <xiaoliang.yang_1@nxp.com> | 2021-07-05 18:26:54 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-03 10:09:25 +0200 |
| commit | b2091d47a14e8e6b3f03d792c1b25255d60b3219 (patch) | |
| tree | ad738c58b92fb66ef0353f6e4a74d7bd9eb1158f | |
| parent | ac874290e75cd5250bcb80632a32a6c64c6ac04a (diff) | |
| download | linux-stable-b2091d47a14e8e6b3f03d792c1b25255d60b3219.tar.gz linux-stable-b2091d47a14e8e6b3f03d792c1b25255d60b3219.tar.bz2 linux-stable-b2091d47a14e8e6b3f03d792c1b25255d60b3219.zip | |
net: stmmac: add mutex lock to protect est parameters
[ Upstream commit b2aae654a4794ef898ad33a179f341eb610f6b85 ]
Add a mutex lock to protect est structure parameters so that the
EST parameters can be updated by other threads.
Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | 14 | ||||
| -rw-r--r-- | include/linux/stmmac.h | 1 |
2 files changed, 14 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c index 40dc14d1415f..6bd9f0c50ffe 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c @@ -689,14 +689,18 @@ static int tc_setup_taprio(struct stmmac_priv *priv, GFP_KERNEL); if (!plat->est) return -ENOMEM; + + mutex_init(&priv->plat->est->lock); } else { memset(plat->est, 0, sizeof(*plat->est)); } size = qopt->num_entries; + mutex_lock(&priv->plat->est->lock); priv->plat->est->gcl_size = size; priv->plat->est->enable = qopt->enable; + mutex_unlock(&priv->plat->est->lock); for (i = 0; i < size; i++) { s64 delta_ns = qopt->entries[i].interval; @@ -727,6 +731,7 @@ static int tc_setup_taprio(struct stmmac_priv *priv, priv->plat->est->gcl[i] = delta_ns | (gates << wid); } + mutex_lock(&priv->plat->est->lock); /* Adjust for real system time */ priv->ptp_clock_ops.gettime64(&priv->ptp_clock_ops, ¤t_time); current_time_ns = timespec64_to_ktime(current_time); @@ -751,19 +756,23 @@ static int tc_setup_taprio(struct stmmac_priv *priv, priv->plat->est->ctr[0] = do_div(ctr, NSEC_PER_SEC); priv->plat->est->ctr[1] = (u32)ctr; - if (fpe && !priv->dma_cap.fpesel) + if (fpe && !priv->dma_cap.fpesel) { + mutex_unlock(&priv->plat->est->lock); return -EOPNOTSUPP; + } ret = stmmac_fpe_configure(priv, priv->ioaddr, priv->plat->tx_queues_to_use, priv->plat->rx_queues_to_use, fpe); if (ret && fpe) { + mutex_unlock(&priv->plat->est->lock); netdev_err(priv->dev, "failed to enable Frame Preemption\n"); return ret; } ret = stmmac_est_configure(priv, priv->ioaddr, priv->plat->est, priv->plat->clk_ptp_rate); + mutex_unlock(&priv->plat->est->lock); if (ret) { netdev_err(priv->dev, "failed to configure EST\n"); goto disable; @@ -773,9 +782,12 @@ static int tc_setup_taprio(struct stmmac_priv *priv, return 0; disable: + mutex_lock(&priv->plat->est->lock); priv->plat->est->enable = false; stmmac_est_configure(priv, priv->ioaddr, priv->plat->est, priv->plat->clk_ptp_rate); + mutex_unlock(&priv->plat->est->lock); + return ret; } diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index 15ca6b4167cc..b56e1dedcf2f 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -112,6 +112,7 @@ struct stmmac_axi { #define EST_GCL 1024 struct stmmac_est { + struct mutex lock; int enable; u32 btr_offset[2]; u32 btr[2]; |