netdev - [PATCH 0/6] backport patches to improve clocks management for stmmac driver

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Date:   Fri, 19 Nov 2021 10:53:53 +0800
From:   Meng Li <Meng.Li@...driver.com>
To:     stable@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        mcoquelin.stm32@...il.com, linux@...linux.org.uk, andrew@...n.ch,
        qiangqing.zhang@....com
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        meng.li@...driver.com
Subject: [PATCH 0/6] backport patches to improve clocks management for stmmac driver

From: Meng Li <meng.li@...driver.com>

In stable kernel v5.10, when run below command to remove ethernet driver on
stratix10 platform, there will be warning trace as below:

$ cd /sys/class/net/eth0/device/driver/
$ echo ff800000.ethernet > unbind

WARNING: CPU: 3 PID: 386 at drivers/clk/clk.c:810 clk_core_unprepare+0x114/0x274
Modules linked in: sch_fq_codel
CPU: 3 PID: 386 Comm: sh Tainted: G        W         5.10.74-yocto-standard #1
Hardware name: SoCFPGA Stratix 10 SoCDK (DT)
pstate: 00000005 (nzcv daif -PAN -UAO -TCO BTYPE=--)
pc : clk_core_unprepare+0x114/0x274
lr : clk_core_unprepare+0x114/0x274
sp : ffff800011bdbb10
clk_core_unprepare+0x114/0x274
 clk_unprepare+0x38/0x50
 stmmac_remove_config_dt+0x40/0x80
 stmmac_pltfr_remove+0x64/0x80
 platform_drv_remove+0x38/0x60
 ... ..
 el0_sync_handler+0x1a4/0x1b0
 el0_sync+0x180/0x1c0
This issue is introduced by introducing upstream commit 8f269102baf7
("net: stmmac: disable clocks in stmmac_remove_config_dt()")

But in latest mainline kernel, there is no this issue. Because commit
5ec55823438e("net: stmmac: add clocks management for gmac driver") and its
folowing fixing commits improved clocks management for stmmac driver.
Therefore, backport them to stable kernel v5.10.

Joakim Zhang (2):
  net: stmmac: add clocks management for gmac driver
  net: stmmac: fix system hang if change mac address after interface
    ifdown

Michael Riesch (1):
  net: stmmac: dwmac-rk: fix unbalanced pm_runtime_enable warnings

Wei Yongjun (1):
  net: stmmac: platform: fix build error with !CONFIG_PM_SLEEP

Wong Vee Khee (1):
  net: stmmac: fix issue where clk is being unprepared twice

Yang Yingliang (1):
  net: stmmac: fix missing unlock on error in stmmac_suspend()

 .../net/ethernet/stmicro/stmmac/dwmac-rk.c    |   9 --
 drivers/net/ethernet/stmicro/stmmac/stmmac.h  |   1 +
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |  87 ++++++++++++--
 .../net/ethernet/stmicro/stmmac/stmmac_mdio.c | 111 ++++++++++++++----
 .../ethernet/stmicro/stmmac/stmmac_platform.c |  30 ++++-
 5 files changed, 187 insertions(+), 51 deletions(-)

-- 
2.17.1