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Date: Tue, 9 May 2023 17:25:21 +0800
From: kernel test robot <lkp@...el.com>
To: Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Florian Fainelli <f.fainelli@...il.com>,
Doug Berger <opendmb@...il.com>,
Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Andrew Lunn <andrew@...n.ch>,
Heiner Kallweit <hkallweit1@...il.com>,
Russell King <linux@...linux.org.uk>,
Marek Behún <kabel@...nel.org>,
Peter Geis <pgwipeout@...il.com>, Frank <Frank.Sae@...or-comm.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/3] net: phy: broadcom: Add support for
Wake-on-LAN
Hi Florian,
kernel test robot noticed the following build warnings:
[auto build test WARNING on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Florian-Fainelli/net-phy-Let-drivers-check-Wake-on-LAN-status/20230509-024405
base: net-next/main
patch link: https://lore.kernel.org/r/20230508184309.1628108-3-f.fainelli%40gmail.com
patch subject: [PATCH net-next 2/3] net: phy: broadcom: Add support for Wake-on-LAN
config: s390-randconfig-r036-20230508 (https://download.01.org/0day-ci/archive/20230509/202305091725.uiFVrVZR-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project b0fb98227c90adf2536c9ad644a74d5e92961111)
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 s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/9bc5e73961748471e3dae79cb94f329382a6d490
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Florian-Fainelli/net-phy-Let-drivers-check-Wake-on-LAN-status/20230509-024405
git checkout 9bc5e73961748471e3dae79cb94f329382a6d490
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/net/phy/ kernel/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305091725.uiFVrVZR-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/net/phy/broadcom.c:13:
In file included from drivers/net/phy/bcm-phy-lib.h:9:
In file included from include/linux/brcmphy.h:5:
In file included from include/linux/phy.h:16:
In file included from include/linux/ethtool.h:18:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:28:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:547:31: 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:560:61: 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/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from drivers/net/phy/broadcom.c:13:
In file included from drivers/net/phy/bcm-phy-lib.h:9:
In file included from include/linux/brcmphy.h:5:
In file included from include/linux/phy.h:16:
In file included from include/linux/ethtool.h:18:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:28:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:573:61: 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/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from drivers/net/phy/broadcom.c:13:
In file included from drivers/net/phy/bcm-phy-lib.h:9:
In file included from include/linux/brcmphy.h:5:
In file included from include/linux/phy.h:16:
In file included from include/linux/ethtool.h:18:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:28:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:584:33: 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:594:59: 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:604:59: 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:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> drivers/net/phy/broadcom.c:471:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (priv->wake_irq_enabled != state) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/phy/broadcom.c:479:9: note: uninitialized use occurs here
return ret;
^~~
drivers/net/phy/broadcom.c:471:2: note: remove the 'if' if its condition is always true
if (priv->wake_irq_enabled != state) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/phy/broadcom.c:466:9: note: initialize the variable 'ret' to silence this warning
int ret;
^
= 0
13 warnings generated.
vim +471 drivers/net/phy/broadcom.c
462
463 static int bcm54xx_set_wakeup_irq(struct phy_device *phydev, bool state)
464 {
465 struct bcm54xx_phy_priv *priv = phydev->priv;
466 int ret;
467
468 if (!bcm54xx_phy_can_wakeup(phydev))
469 return 0;
470
> 471 if (priv->wake_irq_enabled != state) {
472 if (state)
473 ret = enable_irq_wake(priv->wake_irq);
474 else
475 ret = disable_irq_wake(priv->wake_irq);
476 priv->wake_irq_enabled = state;
477 }
478
479 return ret;
480 }
481
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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