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Message-ID: <202210190536.eSUyX814-lkp@intel.com>
Date: Wed, 19 Oct 2022 05:39:56 +0800
From: kernel test robot <lkp@...el.com>
To: "Maciej W. Rozycki" <macro@...am.me.uk>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org, Palmer Dabbelt <palmer@...osinc.com>,
Arnd Bergmann <arnd@...db.de>
Subject: drivers/parport/parport_pc.c:278:6: warning: performing pointer
arithmetic on a null pointer has undefined behavior
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: aae703b02f92bde9264366c545e87cec451de471
commit: 9cc205e3c17d5716da7ebb7fa0c985555e95d009 RISC-V: Make port I/O string accessors actually work
date: 5 days ago
config: riscv-randconfig-r024-20221019
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9cc205e3c17d5716da7ebb7fa0c985555e95d009
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 9cc205e3c17d5716da7ebb7fa0c985555e95d009
# 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/iio/adc/ drivers/parport/ kernel/
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 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/parport/parport_pc.c:51:
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/parport/parport_pc.c:51:
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/parport/parport_pc.c:51:
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/parport/parport_pc.c:51:
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/parport/parport_pc.c:51:
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/parport/parport_pc.c:51:
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/parport/parport_pc.c:278:6: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insl(EPPDATA(port), buf, 4);
^~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/parport/parport_pc.c:280:6: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb(EPPDATA(port), buf, 16);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
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/parport/parport_pc.c:303:4: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insl(EPPDATA(port), buf, (length >> 2));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/parport/parport_pc.c:305:4: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb(EPPDATA(port), buf, length);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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/parport/parport_pc.c:332:4: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsl(EPPDATA(port), buf, (length >> 2));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/parport/parport_pc.c:334:4: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsb(EPPDATA(port), buf, length);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
drivers/parport/parport_pc.c:359:3: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
insb(EPPADDR(port), buf, length);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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/parport/parport_pc.c:385:3: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
outsb(EPPADDR(port), buf, length);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
~~~~~~~~~~ ^
21 warnings generated.
--
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.
vim +278 drivers/parport/parport_pc.c
^1da177e4c3f4152 Linus Torvalds 2005-04-16 257
^1da177e4c3f4152 Linus Torvalds 2005-04-16 258 #ifdef CONFIG_PARPORT_1284
^1da177e4c3f4152 Linus Torvalds 2005-04-16 259 static size_t parport_pc_epp_read_data(struct parport *port, void *buf,
^1da177e4c3f4152 Linus Torvalds 2005-04-16 260 size_t length, int flags)
^1da177e4c3f4152 Linus Torvalds 2005-04-16 261 {
^1da177e4c3f4152 Linus Torvalds 2005-04-16 262 size_t got = 0;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 263
^1da177e4c3f4152 Linus Torvalds 2005-04-16 264 if (flags & PARPORT_W91284PIC) {
^1da177e4c3f4152 Linus Torvalds 2005-04-16 265 unsigned char status;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 266 size_t left = length;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 267
^1da177e4c3f4152 Linus Torvalds 2005-04-16 268 /* use knowledge about data lines..:
^1da177e4c3f4152 Linus Torvalds 2005-04-16 269 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
^1da177e4c3f4152 Linus Torvalds 2005-04-16 270 * pError is 1 if there are 16 bytes in the Warp's FIFO
^1da177e4c3f4152 Linus Torvalds 2005-04-16 271 */
^1da177e4c3f4152 Linus Torvalds 2005-04-16 272 status = inb(STATUS(port));
^1da177e4c3f4152 Linus Torvalds 2005-04-16 273
3aeda9bc95d06430 Alan Cox 2009-06-11 274 while (!(status & 0x08) && got < length) {
3aeda9bc95d06430 Alan Cox 2009-06-11 275 if (left >= 16 && (status & 0x20) && !(status & 0x08)) {
^1da177e4c3f4152 Linus Torvalds 2005-04-16 276 /* can grab 16 bytes from warp fifo */
3aeda9bc95d06430 Alan Cox 2009-06-11 277 if (!((long)buf & 0x03))
^1da177e4c3f4152 Linus Torvalds 2005-04-16 @278 insl(EPPDATA(port), buf, 4);
3aeda9bc95d06430 Alan Cox 2009-06-11 279 else
^1da177e4c3f4152 Linus Torvalds 2005-04-16 280 insb(EPPDATA(port), buf, 16);
^1da177e4c3f4152 Linus Torvalds 2005-04-16 281 buf += 16;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 282 got += 16;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 283 left -= 16;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 284 } else {
^1da177e4c3f4152 Linus Torvalds 2005-04-16 285 /* grab single byte from the warp fifo */
^1da177e4c3f4152 Linus Torvalds 2005-04-16 286 *((char *)buf) = inb(EPPDATA(port));
^1da177e4c3f4152 Linus Torvalds 2005-04-16 287 buf++;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 288 got++;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 289 left--;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 290 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 291 status = inb(STATUS(port));
^1da177e4c3f4152 Linus Torvalds 2005-04-16 292 if (status & 0x01) {
^1da177e4c3f4152 Linus Torvalds 2005-04-16 293 /* EPP timeout should never occur... */
aa3d6e7c49e3b480 Joe Perches 2020-04-03 294 printk(KERN_DEBUG "%s: EPP timeout occurred while talking to w91284pic (should not have done)\n",
aa3d6e7c49e3b480 Joe Perches 2020-04-03 295 port->name);
^1da177e4c3f4152 Linus Torvalds 2005-04-16 296 clear_epp_timeout(port);
^1da177e4c3f4152 Linus Torvalds 2005-04-16 297 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 298 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 299 return got;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 300 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 301 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
3aeda9bc95d06430 Alan Cox 2009-06-11 302 if (!(((long)buf | length) & 0x03))
^1da177e4c3f4152 Linus Torvalds 2005-04-16 303 insl(EPPDATA(port), buf, (length >> 2));
3aeda9bc95d06430 Alan Cox 2009-06-11 304 else
^1da177e4c3f4152 Linus Torvalds 2005-04-16 305 insb(EPPDATA(port), buf, length);
^1da177e4c3f4152 Linus Torvalds 2005-04-16 306 if (inb(STATUS(port)) & 0x01) {
^1da177e4c3f4152 Linus Torvalds 2005-04-16 307 clear_epp_timeout(port);
^1da177e4c3f4152 Linus Torvalds 2005-04-16 308 return -EIO;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 309 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 310 return length;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 311 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 312 for (; got < length; got++) {
^1da177e4c3f4152 Linus Torvalds 2005-04-16 313 *((char *)buf) = inb(EPPDATA(port));
^1da177e4c3f4152 Linus Torvalds 2005-04-16 314 buf++;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 315 if (inb(STATUS(port)) & 0x01) {
^1da177e4c3f4152 Linus Torvalds 2005-04-16 316 /* EPP timeout */
^1da177e4c3f4152 Linus Torvalds 2005-04-16 317 clear_epp_timeout(port);
^1da177e4c3f4152 Linus Torvalds 2005-04-16 318 break;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 319 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 320 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 321
^1da177e4c3f4152 Linus Torvalds 2005-04-16 322 return got;
^1da177e4c3f4152 Linus Torvalds 2005-04-16 323 }
^1da177e4c3f4152 Linus Torvalds 2005-04-16 324
:::::: The code at line 278 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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