From: Andre Guedes <andre.guedes@intel.com>
Date: Wed, 3 Jun 2020 17:01:02 -0700
Subject: igc: Check __IGC_PTP_TX_IN_PROGRESS instead of ptp_tx_skb
Patch-mainline: v5.9-rc1
Git-commit: 1801f8d9292fdbcf8b0fc6d6455eb05d508845a3
References: jsc#SLE-13533
The __IGC_PTP_TX_IN_PROGRESS flag indicates we have a pending Tx
timestamp. In some places, instead of checking that flag, we check
adapter->ptp_tx_skb. This patch fixes those places to use the flag.
Quick note about igc_ptp_tx_hwtstamp() change: when that function is
called, adapter->ptp_tx_skb is expected to be valid always so we
WARN_ON_ONCE() in case it is not.
Quick note about igc_ptp_suspend() change: when suspending, we don't
really need to check if there is a pending timestamp. We can simply
clear it unconditionally.
Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/igc/igc_ptp.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
--- a/drivers/net/ethernet/intel/igc/igc_ptp.c
+++ b/drivers/net/ethernet/intel/igc/igc_ptp.c
@@ -404,9 +404,6 @@ void igc_ptp_tx_hang(struct igc_adapter
bool timeout = time_is_before_jiffies(adapter->ptp_tx_start +
IGC_PTP_TX_TIMEOUT);
- if (!adapter->ptp_tx_skb)
- return;
-
if (!test_bit(__IGC_PTP_TX_IN_PROGRESS, &adapter->state))
return;
@@ -435,6 +432,9 @@ static void igc_ptp_tx_hwtstamp(struct i
struct igc_hw *hw = &adapter->hw;
u64 regval;
+ if (WARN_ON_ONCE(!skb))
+ return;
+
regval = rd32(IGC_TXSTMPL);
regval |= (u64)rd32(IGC_TXSTMPH) << 32;
igc_ptp_systim_to_hwtstamp(adapter, &shhwtstamps, regval);
@@ -466,7 +466,7 @@ static void igc_ptp_tx_work(struct work_
struct igc_hw *hw = &adapter->hw;
u32 tsynctxctl;
- if (!adapter->ptp_tx_skb)
+ if (!test_bit(__IGC_PTP_TX_IN_PROGRESS, &adapter->state))
return;
if (time_is_before_jiffies(adapter->ptp_tx_start +
@@ -588,11 +588,9 @@ void igc_ptp_suspend(struct igc_adapter
return;
cancel_work_sync(&adapter->ptp_tx_work);
- if (adapter->ptp_tx_skb) {
- dev_kfree_skb_any(adapter->ptp_tx_skb);
- adapter->ptp_tx_skb = NULL;
- clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state);
- }
+ dev_kfree_skb_any(adapter->ptp_tx_skb);
+ adapter->ptp_tx_skb = NULL;
+ clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state);
}
/**