From: Michael Chan michael.chan@broadcom.com
[ Upstream commit a53906908148d64423398a62c4435efb0d09652c ]
All changes related to bp->link_info require the protection of the link_lock mutex. It's not sufficient to rely just on RTNL.
Fixes: 163e9ef63641 ("bnxt_en: Fix race when modifying pause settings.") Reviewed-by: Edwin Peer edwin.peer@broadcom.com Signed-off-by: Michael Chan michael.chan@broadcom.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 31 ++++++++++++++-------- 1 file changed, 20 insertions(+), 11 deletions(-)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -1665,9 +1665,12 @@ static int bnxt_set_pauseparam(struct ne if (!BNXT_SINGLE_PF(bp)) return -EOPNOTSUPP;
+ mutex_lock(&bp->link_lock); if (epause->autoneg) { - if (!(link_info->autoneg & BNXT_AUTONEG_SPEED)) - return -EINVAL; + if (!(link_info->autoneg & BNXT_AUTONEG_SPEED)) { + rc = -EINVAL; + goto pause_exit; + }
link_info->autoneg |= BNXT_AUTONEG_FLOW_CTRL; if (bp->hwrm_spec_code >= 0x10201) @@ -1688,11 +1691,11 @@ static int bnxt_set_pauseparam(struct ne if (epause->tx_pause) link_info->req_flow_ctrl |= BNXT_LINK_PAUSE_TX;
- if (netif_running(dev)) { - mutex_lock(&bp->link_lock); + if (netif_running(dev)) rc = bnxt_hwrm_set_pause(bp); - mutex_unlock(&bp->link_lock); - } + +pause_exit: + mutex_unlock(&bp->link_lock); return rc; }
@@ -2397,8 +2400,7 @@ static int bnxt_set_eee(struct net_devic struct bnxt *bp = netdev_priv(dev); struct ethtool_eee *eee = &bp->eee; struct bnxt_link_info *link_info = &bp->link_info; - u32 advertising = - _bnxt_fw_to_ethtool_adv_spds(link_info->advertising, 0); + u32 advertising; int rc = 0;
if (!BNXT_SINGLE_PF(bp)) @@ -2407,19 +2409,23 @@ static int bnxt_set_eee(struct net_devic if (!(bp->flags & BNXT_FLAG_EEE_CAP)) return -EOPNOTSUPP;
+ mutex_lock(&bp->link_lock); + advertising = _bnxt_fw_to_ethtool_adv_spds(link_info->advertising, 0); if (!edata->eee_enabled) goto eee_ok;
if (!(link_info->autoneg & BNXT_AUTONEG_SPEED)) { netdev_warn(dev, "EEE requires autoneg\n"); - return -EINVAL; + rc = -EINVAL; + goto eee_exit; } if (edata->tx_lpi_enabled) { if (bp->lpi_tmr_hi && (edata->tx_lpi_timer > bp->lpi_tmr_hi || edata->tx_lpi_timer < bp->lpi_tmr_lo)) { netdev_warn(dev, "Valid LPI timer range is %d and %d microsecs\n", bp->lpi_tmr_lo, bp->lpi_tmr_hi); - return -EINVAL; + rc = -EINVAL; + goto eee_exit; } else if (!bp->lpi_tmr_hi) { edata->tx_lpi_timer = eee->tx_lpi_timer; } @@ -2429,7 +2435,8 @@ static int bnxt_set_eee(struct net_devic } else if (edata->advertised & ~advertising) { netdev_warn(dev, "EEE advertised %x must be a subset of autoneg advertised speeds %x\n", edata->advertised, advertising); - return -EINVAL; + rc = -EINVAL; + goto eee_exit; }
eee->advertised = edata->advertised; @@ -2441,6 +2448,8 @@ eee_ok: if (netif_running(dev)) rc = bnxt_hwrm_set_link_setting(bp, false, true);
+eee_exit: + mutex_unlock(&bp->link_lock); return rc; }