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Message-ID: <202208210548.MCoIwyQl-lkp@intel.com>
Date: Sun, 21 Aug 2022 05:39:21 +0800
From: kernel test robot <lkp@...el.com>
To: Arminder Singh <arminders208@...look.com>,
linux-kernel@...r.kernel.org
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
Sven Peter <sven@...npeter.dev>,
Alyssa Rosenzweig <alyssa@...enzweig.io>,
Hector Martin <marcan@...can.st>,
Michael Ellerman <mpe@...erman.id.au>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
linux-arm-kernel@...ts.infradead.org,
linuxppc-dev@...ts.ozlabs.org, linux-i2c@...r.kernel.org,
Arminder Singh <arminders208@...look.com>
Subject: Re: [PATCH] i2c: pasemi: Add IRQ support for Apple Silicon
Hi Arminder,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on powerpc/next]
[also build test WARNING on linus/master v6.0-rc1 next-20220819]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Arminder-Singh/i2c-pasemi-Add-IRQ-support-for-Apple-Silicon/20220821-034703
base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: riscv-randconfig-r042-20220821 (https://download.01.org/0day-ci/archive/20220821/202208210548.MCoIwyQl-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project c9a41fe60ab62f7a40049c100adcc8087a47669b)
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/98584b2b51d808ab582798c7a50511e8c1889ced
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Arminder-Singh/i2c-pasemi-Add-IRQ-support-for-Apple-Silicon/20220821-034703
git checkout 98584b2b51d808ab582798c7a50511e8c1889ced
# 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/i2c/busses/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from drivers/i2c/busses/i2c-pasemi-core.c:9:
In file included from include/linux/pci.h:38:
In file included from include/linux/interrupt.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: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/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/i2c/busses/i2c-pasemi-core.c:9:
In file included from include/linux/pci.h:38:
In file included from include/linux/interrupt.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: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/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/i2c/busses/i2c-pasemi-core.c:9:
In file included from include/linux/pci.h:38:
In file included from include/linux/interrupt.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: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:1134:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
>> drivers/i2c/busses/i2c-pasemi-core.c:86:6: warning: variable 'status' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (smbus->use_irq) {
^~~~~~~~~~~~~~
drivers/i2c/busses/i2c-pasemi-core.c:92:12: note: uninitialized use occurs here
while (!(status & SMSTA_XEN) && timeout--) {
^~~~~~
drivers/i2c/busses/i2c-pasemi-core.c:86:2: note: remove the 'if' if its condition is always true
if (smbus->use_irq) {
^~~~~~~~~~~~~~~~~~~~
drivers/i2c/busses/i2c-pasemi-core.c:83:21: note: initialize the variable 'status' to silence this warning
unsigned int status;
^
= 0
8 warnings generated.
vim +86 drivers/i2c/busses/i2c-pasemi-core.c
79
80 static int pasemi_smb_waitready(struct pasemi_smbus *smbus)
81 {
82 int timeout = 10;
83 unsigned int status;
84 unsigned int bitmask = SMSTA_XEN | SMSTA_MTN;
85
> 86 if (smbus->use_irq) {
87 reinit_completion(&smbus->irq_completion);
88 reg_write(smbus, REG_IMASK, bitmask);
89 wait_for_completion_timeout(&smbus->irq_completion, msecs_to_jiffies(10));
90 status = reg_read(smbus, REG_SMSTA);
91 } else {
92 while (!(status & SMSTA_XEN) && timeout--) {
93 msleep(1);
94 status = reg_read(smbus, REG_SMSTA);
95 }
96 }
97
98
99 /* Got NACK? */
100 if (status & SMSTA_MTN)
101 return -ENXIO;
102
103 if (timeout < 0) {
104 dev_warn(smbus->dev, "Timeout, status 0x%08x\n", status);
105 reg_write(smbus, REG_SMSTA, status);
106 return -ETIME;
107 }
108
109 /* Clear XEN */
110 reg_write(smbus, REG_SMSTA, SMSTA_XEN);
111
112 return 0;
113 }
114
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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