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authorHeiner Kallweit <hkallweit1@gmail.com>2023-11-26 21:36:46 +0300
committerPaolo Abeni <pabeni@redhat.com>2023-11-28 14:50:24 +0300
commit59d395ed606d8df14615712b0cdcdadb2d962175 (patch)
treed9dbbb2442983f9c7b7af187d0bfe7ffbf804c7b /drivers
parent45b3fae4675dc1d4ee2d7aefa19d85ee4f891377 (diff)
downloadlinux-59d395ed606d8df14615712b0cdcdadb2d962175.tar.xz
r8169: fix deadlock on RTL8125 in jumbo mtu mode
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/realtek/r8169_main.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 295366a85c63..a43e33e4b25e 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -579,6 +579,7 @@ 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
};
@@ -4582,6 +4583,8 @@ 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();
@@ -4615,7 +4618,7 @@ 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);
}