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r8169: fix deadlock on RTL8125 in jumbo mtu mode

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[ Upstream commit 59d395ed606d8df14615712b0cdcdadb2d962175 ]

The original change results in a deadlock if jumbo mtu mode is used.
Reason is that the phydev lock is held when rtl_reset_work() is called
here, and rtl_jumbo_config() calls phy_start_aneg() which also tries
to acquire the phydev lock. Fix this by calling rtl_reset_work()
asynchronously.

Fixes: 621735f59064 ("r8169: fix rare issue with broken rx after link-down on RTL8125")
Reported-by: Ian Chen <free122448@hotmail.com>
Tested-by: Ian Chen <free122448@hotmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/caf6a487-ef8c-4570-88f9-f47a659faf33@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Heiner Kallweit 2023-11-26 19:36:46 +01:00 committed by Greg Kroah-Hartman
parent 0249024aa4
commit 6ed02493ef
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/realtek/r8169_main.c
View File

@ -588,6 +588,7 @@ struct rtl8169_tc_offsets {
enum rtl_flag {
RTL_FLAG_TASK_ENABLED = 0,
RTL_FLAG_TASK_RESET_PENDING,
RTL_FLAG_TASK_RESET_NO_QUEUE_WAKE,
RTL_FLAG_TASK_TX_TIMEOUT,
RTL_FLAG_MAX
};
@ -4646,6 +4647,8 @@ static void rtl_task(struct work_struct *work)
reset:
rtl_reset_work(tp);
netif_wake_queue(tp->dev);
} else if (test_and_clear_bit(RTL_FLAG_TASK_RESET_NO_QUEUE_WAKE, tp->wk.flags)) {
rtl_reset_work(tp);
}
out_unlock:
rtnl_unlock();
@ -4679,7 +4682,7 @@ static void r8169_phylink_handler(struct net_device *ndev)
} else {
/* In few cases rx is broken after link-down otherwise */
if (rtl_is_8125(tp))
rtl_reset_work(tp);
rtl_schedule_task(tp, RTL_FLAG_TASK_RESET_NO_QUEUE_WAKE);
pm_runtime_idle(d);
}