5.15-stable review patch. If anyone has any objections, please let me know.
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From: Heiner Kallweit hkallweit1@gmail.com
[ Upstream commit 80c0576ef179311f624bc450fede30a89afe9792 ]
There are still single reports of systems where ASPM incompatibilities cause tx timeouts. It's not clear whom to blame, so let's disable ASPM in case of a tx timeout.
v2: - add one-time warning for informing the user
Signed-off-by: Heiner Kallweit hkallweit1@gmail.com Reviewed-by: Alexander Duyck alexanderduyck@fb.com Link: https://lore.kernel.org/r/92369a92-dc32-4529-0509-11459ba0e391@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Stable-dep-of: 59d395ed606d ("r8169: fix deadlock on RTL8125 in jumbo mtu mode") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/realtek/r8169_main.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index 84fb739679298..c640896f7b7e2 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -588,6 +588,7 @@ struct rtl8169_tc_offsets { enum rtl_flag { RTL_FLAG_TASK_ENABLED = 0, RTL_FLAG_TASK_RESET_PENDING, + RTL_FLAG_TASK_TX_TIMEOUT, RTL_FLAG_MAX };
@@ -4029,7 +4030,7 @@ static void rtl8169_tx_timeout(struct net_device *dev, unsigned int txqueue) { struct rtl8169_private *tp = netdev_priv(dev);
- rtl_schedule_task(tp, RTL_FLAG_TASK_RESET_PENDING); + rtl_schedule_task(tp, RTL_FLAG_TASK_TX_TIMEOUT); }
static int rtl8169_tx_map(struct rtl8169_private *tp, const u32 *opts, u32 len, @@ -4624,6 +4625,7 @@ static void rtl_task(struct work_struct *work) { struct rtl8169_private *tp = container_of(work, struct rtl8169_private, wk.work); + int ret;
rtnl_lock();
@@ -4631,7 +4633,17 @@ static void rtl_task(struct work_struct *work) !test_bit(RTL_FLAG_TASK_ENABLED, tp->wk.flags)) goto out_unlock;
+ if (test_and_clear_bit(RTL_FLAG_TASK_TX_TIMEOUT, tp->wk.flags)) { + /* ASPM compatibility issues are a typical reason for tx timeouts */ + ret = pci_disable_link_state(tp->pci_dev, PCIE_LINK_STATE_L1 | + PCIE_LINK_STATE_L0S); + if (!ret) + netdev_warn_once(tp->dev, "ASPM disabled on Tx timeout\n"); + goto reset; + } + if (test_and_clear_bit(RTL_FLAG_TASK_RESET_PENDING, tp->wk.flags)) { +reset: rtl_reset_work(tp); netif_wake_queue(tp->dev); }