drivers/iio/adc/ad7606_par.c:24:2: warning: performing pointer arithmetic on a null pointer has undefined behavior

From: kernel test robot
Date: Fri Aug 11 2023 - 14:19:55 EST

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Hi Yimin,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 25aa0bebba72b318e71fe205bfd1236550cc9534
commit: b5e2c507b06c9d36411845149162a804ae7b04a9 riscv: Kconfig: Allow RV32 to build with no MMU
date: 5 months ago
config: riscv-randconfig-r014-20230812 (https://download.01.org/0day-ci/archive/20230812/202308120214.IkzxpkG2-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce: (https://download.01.org/0day-ci/archive/20230812/202308120214.IkzxpkG2-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308120214.IkzxpkG2-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

In file included from drivers/iio/adc/ad7606_par.c:13:
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/iio/adc/ad7606_par.c:13:
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/iio/adc/ad7606_par.c:13:
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:743:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/iio/adc/ad7606_par.c:13:
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:751:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insw(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/iio/adc/ad7606_par.c:13:
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:759:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insl(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/iio/adc/ad7606_par.c:13:
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:768:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsb(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/iio/adc/ad7606_par.c:13:
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:777:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsw(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/iio/adc/ad7606_par.c:13:
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:786:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsl(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/iio/adc/ad7606_par.c:13:
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: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/iio/adc/ad7606_par.c:24:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insw((unsigned long)st->base_address, buf, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/iio/adc/ad7606_par.c:39:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb((unsigned long)st->base_address, buf, count * 2);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
15 warnings generated.
--
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:743:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/comedi/drivers/das16m1.c:44:
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:751:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insw(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/comedi/drivers/das16m1.c:44:
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:759:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insl(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/comedi/drivers/das16m1.c:44:
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:768:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsb(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/comedi/drivers/das16m1.c:44:
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:777:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsw(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/comedi/drivers/das16m1.c:44:
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:786:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsl(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/comedi/drivers/das16m1.c:44:
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: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/comedi/drivers/das16m1.c:412:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insw(dev->iobase, devpriv->ai_buffer, num_samples);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
14 warnings generated.
--
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:743:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/net/wireless/cisco/airo.c:34:
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:751:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insw(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/net/wireless/cisco/airo.c:34:
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:759:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insl(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/net/wireless/cisco/airo.c:34:
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:768:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsb(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/net/wireless/cisco/airo.c:34:
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:777:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsw(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/net/wireless/cisco/airo.c:34:
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:786:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsl(addr, buffer, count);
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
In file included from drivers/net/wireless/cisco/airo.c:34:
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: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/net/wireless/cisco/airo.c:4100:4: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insw(ai->dev->base_addr+DATA0+whichbap,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/net/wireless/cisco/airo.c:4103:4: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb(ai->dev->base_addr+DATA0+whichbap,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/net/wireless/cisco/airo.c:4121:3: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insw(ai->dev->base_addr+DATA0+whichbap, pu16Dst, bytelen>>1);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/net/wireless/cisco/airo.c:4123:3: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb(ai->dev->base_addr+DATA0+whichbap, pu16Dst, bytelen);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/net/wireless/cisco/airo.c:4133:3: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsw(ai->dev->base_addr+DATA0+whichbap,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/net/wireless/cisco/airo.c:4136:3: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsb(ai->dev->base_addr+DATA0+whichbap, pu16Src, bytelen);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
19 warnings generated.
..

vim +24 drivers/iio/adc/ad7606_par.c

b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 17
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 18 static int ad7606_par16_read_block(struct device *dev,
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 19 int count, void *buf)
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 20 {
dae013afa72311 drivers/staging/iio/adc/ad7606_par.c Wolfram Sang 2018-04-19 21 struct iio_dev *indio_dev = dev_get_drvdata(dev);
e61181d0a3e678 drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-05-18 22 struct ad7606_state *st = iio_priv(indio_dev);
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 23
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 @24 insw((unsigned long)st->base_address, buf, count);
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 25
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 26 return 0;
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 27 }
b9618c0cacd7cf drivers/staging/iio/adc/ad7606_par.c Michael Hennerich 2011-02-22 28

:::::: The code at line 24 was first introduced by commit
:::::: b9618c0cacd7cf56cc3d073c1e9e9a8a3a12864e staging: IIO: ADC: New driver for AD7606/AD7606-6/AD7606-4

:::::: TO: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxx>

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