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Message-ID: <202205071955.IM81bph1-lkp@intel.com>
Date: Sat, 7 May 2022 20:10:10 +0800
From: kernel test robot <lkp@...el.com>
To: Linus Walleij <linus.walleij@...aro.org>,
Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
netdev@...r.kernel.org,
Alvin Šipraga <alsi@...g-olufsen.dk>,
Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH] net: dsa: realtek: rtl8366rb: Serialize indirect PHY
register access
Hi Linus,
I love your patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v5.18-rc5 next-20220506]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/intel-lab-lkp/linux/commits/Linus-Walleij/net-dsa-realtek-rtl8366rb-Serialize-indirect-PHY-register-access/20220507-154616
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 4b97bac0756a81cda5afd45417a99b5bccdcff67
config: riscv-randconfig-c006-20220506 (https://download.01.org/0day-ci/archive/20220507/202205071955.IM81bph1-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project af4cf1c6b8ed0d8102fc5e69acdc2fcbbcdaa9a7)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/5858edf68f246841b19173d0a30ebc5651f7b0c2
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Linus-Walleij/net-dsa-realtek-rtl8366rb-Serialize-indirect-PHY-register-access/20220507-154616
git checkout 5858edf68f246841b19173d0a30ebc5651f7b0c2
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/net/dsa/realtek/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from drivers/net/dsa/realtek/rtl8366rb.c:16:
In file included from include/linux/etherdevice.h:20:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from drivers/net/dsa/realtek/rtl8366rb.c:16:
In file included from include/linux/etherdevice.h:20:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from drivers/net/dsa/realtek/rtl8366rb.c:16:
In file included from include/linux/etherdevice.h:20:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
>> drivers/net/dsa/realtek/rtl8366rb.c:1666:6: warning: variable 'val' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
if (ret) {
^~~
drivers/net/dsa/realtek/rtl8366rb.c:1684:9: note: uninitialized use occurs here
return val;
^~~
drivers/net/dsa/realtek/rtl8366rb.c:1666:2: note: remove the 'if' if its condition is always false
if (ret) {
^~~~~~~~~~
drivers/net/dsa/realtek/rtl8366rb.c:1660:6: warning: variable 'val' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
if (ret)
^~~
drivers/net/dsa/realtek/rtl8366rb.c:1684:9: note: uninitialized use occurs here
return val;
^~~
drivers/net/dsa/realtek/rtl8366rb.c:1660:2: note: remove the 'if' if its condition is always false
if (ret)
^~~~~~~~
drivers/net/dsa/realtek/rtl8366rb.c:1649:9: note: initialize the variable 'val' to silence this warning
u32 val;
^
= 0
9 warnings generated.
vim +1666 drivers/net/dsa/realtek/rtl8366rb.c
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1646
f5f119077b1cd6 drivers/net/dsa/realtek/rtl8366rb.c Luiz Angelo Daros de Luca 2022-01-28 1647 static int rtl8366rb_phy_read(struct realtek_priv *priv, int phy, int regnum)
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1648 {
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1649 u32 val;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1650 u32 reg;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1651 int ret;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1652
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1653 if (phy > RTL8366RB_PHY_NO_MAX)
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1654 return -EINVAL;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1655
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1656 mutex_lock(&priv->map_lock);
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1657
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1658 ret = regmap_write(priv->map_nolock, RTL8366RB_PHY_ACCESS_CTRL_REG,
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1659 RTL8366RB_PHY_CTRL_READ);
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1660 if (ret)
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1661 goto out;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1662
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1663 reg = 0x8000 | (1 << (phy + RTL8366RB_PHY_NO_OFFSET)) | regnum;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1664
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1665 ret = regmap_write(priv->map_nolock, reg, 0);
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 @1666 if (ret) {
f5f119077b1cd6 drivers/net/dsa/realtek/rtl8366rb.c Luiz Angelo Daros de Luca 2022-01-28 1667 dev_err(priv->dev,
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1668 "failed to write PHY%d reg %04x @ %04x, ret %d\n",
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1669 phy, regnum, reg, ret);
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1670 goto out;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1671 }
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1672
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1673 ret = regmap_read(priv->map_nolock, RTL8366RB_PHY_ACCESS_DATA_REG,
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1674 &val);
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1675 if (ret)
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1676 goto out;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1677
f5f119077b1cd6 drivers/net/dsa/realtek/rtl8366rb.c Luiz Angelo Daros de Luca 2022-01-28 1678 dev_dbg(priv->dev, "read PHY%d register 0x%04x @ %08x, val <- %04x\n",
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1679 phy, regnum, reg, val);
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1680
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1681 out:
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1682 mutex_unlock(&priv->map_lock);
5858edf68f2468 drivers/net/dsa/realtek/rtl8366rb.c Alvin Šipraga 2022-05-07 1683
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1684 return val;
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1685 }
d8652956cf37c5 drivers/net/dsa/rtl8366rb.c Linus Walleij 2018-07-14 1686
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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