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Date: Tue, 15 Mar 2022 09:24:15 +0800
From: kernel test robot <lkp@...el.com>
To: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/net/ethernet/myricom/myri10ge/myri10ge.c:390:32: warning:
'cmd.data0' is used uninitialized
Hi Christophe,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 09688c0166e76ce2fb85e86b9d99be8b0084cdf9
commit: 75bacb6d204ed325504f3a656a829f2c6dce2035 myri10ge: switch from 'pci_' to 'dma_' API
date: 7 months ago
config: arc-randconfig-r012-20220313 (https://download.01.org/0day-ci/archive/20220315/202203150948.lhVbfLFc-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 11.2.0
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
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=75bacb6d204ed325504f3a656a829f2c6dce2035
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 75bacb6d204ed325504f3a656a829f2c6dce2035
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/net/ethernet/myricom/myri10ge/
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 include/linux/byteorder/big_endian.h:5,
from arch/arc/include/uapi/asm/byteorder.h:14,
from include/asm-generic/bitops/le.h:7,
from arch/arc/include/asm/bitops.h:373,
from include/linux/bitops.h:33,
from include/linux/kernel.h:12,
from include/linux/skbuff.h:13,
from include/linux/tcp.h:17,
from drivers/net/ethernet/myricom/myri10ge/myri10ge.c:43:
In function 'myri10ge_send_cmd',
inlined from 'myri10ge_get_firmware_capabilities' at drivers/net/ethernet/myricom/myri10ge/myri10ge.c:691:11:
>> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:390:32: warning: 'cmd.data0' is used uninitialized [-Wuninitialized]
390 | buf->data0 = htonl(data->data0);
include/uapi/linux/byteorder/big_endian.h:39:51: note: in definition of macro '__cpu_to_be32'
39 | #define __cpu_to_be32(x) ((__force __be32)(__u32)(x))
| ^
include/linux/byteorder/generic.h:139:18: note: in expansion of macro '___htonl'
139 | #define htonl(x) ___htonl(x)
| ^~~~~~~~
drivers/net/ethernet/myricom/myri10ge/myri10ge.c:390:22: note: in expansion of macro 'htonl'
390 | buf->data0 = htonl(data->data0);
| ^~~~~
drivers/net/ethernet/myricom/myri10ge/myri10ge.c: In function 'myri10ge_get_firmware_capabilities':
drivers/net/ethernet/myricom/myri10ge/myri10ge.c:686:29: note: 'cmd' declared here
686 | struct myri10ge_cmd cmd;
| ^~~
In file included from include/linux/byteorder/big_endian.h:5,
from arch/arc/include/uapi/asm/byteorder.h:14,
from include/asm-generic/bitops/le.h:7,
from arch/arc/include/asm/bitops.h:373,
from include/linux/bitops.h:33,
from include/linux/kernel.h:12,
from include/linux/skbuff.h:13,
from include/linux/tcp.h:17,
from drivers/net/ethernet/myricom/myri10ge/myri10ge.c:43:
In function 'myri10ge_send_cmd',
inlined from 'myri10ge_get_firmware_capabilities' at drivers/net/ethernet/myricom/myri10ge/myri10ge.c:691:11:
>> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:391:32: warning: 'cmd.data1' is used uninitialized [-Wuninitialized]
391 | buf->data1 = htonl(data->data1);
include/uapi/linux/byteorder/big_endian.h:39:51: note: in definition of macro '__cpu_to_be32'
39 | #define __cpu_to_be32(x) ((__force __be32)(__u32)(x))
| ^
include/linux/byteorder/generic.h:139:18: note: in expansion of macro '___htonl'
139 | #define htonl(x) ___htonl(x)
| ^~~~~~~~
drivers/net/ethernet/myricom/myri10ge/myri10ge.c:391:22: note: in expansion of macro 'htonl'
391 | buf->data1 = htonl(data->data1);
| ^~~~~
drivers/net/ethernet/myricom/myri10ge/myri10ge.c: In function 'myri10ge_get_firmware_capabilities':
drivers/net/ethernet/myricom/myri10ge/myri10ge.c:686:29: note: 'cmd' declared here
686 | struct myri10ge_cmd cmd;
| ^~~
In file included from include/linux/byteorder/big_endian.h:5,
from arch/arc/include/uapi/asm/byteorder.h:14,
from include/asm-generic/bitops/le.h:7,
from arch/arc/include/asm/bitops.h:373,
from include/linux/bitops.h:33,
from include/linux/kernel.h:12,
from include/linux/skbuff.h:13,
from include/linux/tcp.h:17,
from drivers/net/ethernet/myricom/myri10ge/myri10ge.c:43:
In function 'myri10ge_send_cmd',
inlined from 'myri10ge_get_firmware_capabilities' at drivers/net/ethernet/myricom/myri10ge/myri10ge.c:691:11:
>> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:392:32: warning: 'cmd.data2' is used uninitialized [-Wuninitialized]
392 | buf->data2 = htonl(data->data2);
include/uapi/linux/byteorder/big_endian.h:39:51: note: in definition of macro '__cpu_to_be32'
39 | #define __cpu_to_be32(x) ((__force __be32)(__u32)(x))
| ^
include/linux/byteorder/generic.h:139:18: note: in expansion of macro '___htonl'
139 | #define htonl(x) ___htonl(x)
| ^~~~~~~~
drivers/net/ethernet/myricom/myri10ge/myri10ge.c:392:22: note: in expansion of macro 'htonl'
392 | buf->data2 = htonl(data->data2);
| ^~~~~
drivers/net/ethernet/myricom/myri10ge/myri10ge.c: In function 'myri10ge_get_firmware_capabilities':
drivers/net/ethernet/myricom/myri10ge/myri10ge.c:686:29: note: 'cmd' declared here
686 | struct myri10ge_cmd cmd;
| ^~~
vim +390 drivers/net/ethernet/myricom/myri10ge/myri10ge.c
7d3510356b066b drivers/net/myri10ge/myri10ge.c Rusty Russell 2010-08-11 375
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 376 static int
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 377 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 378 struct myri10ge_cmd *data, int atomic)
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 379 {
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 380 struct mcp_cmd *buf;
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 381 char buf_bytes[sizeof(*buf) + 8];
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 382 struct mcp_cmd_response *response = mgp->cmd;
e700f9f4a208bf drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-08-14 383 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 384 u32 dma_low, dma_high, result, value;
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 385 int sleep_total = 0;
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 386
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 387 /* ensure buf is aligned to 8 bytes */
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 388 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 389
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 @390 buf->data0 = htonl(data->data0);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 @391 buf->data1 = htonl(data->data1);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 @392 buf->data2 = htonl(data->data2);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 393 buf->cmd = htonl(cmd);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 394 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 395 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 396
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 397 buf->response_addr.low = htonl(dma_low);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 398 buf->response_addr.high = htonl(dma_high);
40f6cff5c47efa drivers/net/myri10ge/myri10ge.c Al Viro 2006-11-20 399 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 400 mb();
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 401 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 402
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 403 /* wait up to 15ms. Longest command is the DMA benchmark,
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 404 * which is capped at 5ms, but runs from a timeout handler
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 405 * that runs every 7.8ms. So a 15ms timeout leaves us with
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 406 * a 2.2ms margin
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 407 */
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 408 if (atomic) {
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 409 /* if atomic is set, do not sleep,
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 410 * and try to get the completion quickly
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 411 * (1ms will be enough for those commands) */
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 412 for (sleep_total = 0;
8e95a2026f3b43 drivers/net/myri10ge/myri10ge.c Joe Perches 2009-12-03 413 sleep_total < 1000 &&
8e95a2026f3b43 drivers/net/myri10ge/myri10ge.c Joe Perches 2009-12-03 414 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
bd2db0cf2411eb drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-05-09 415 sleep_total += 10) {
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 416 udelay(10);
bd2db0cf2411eb drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-05-09 417 mb();
bd2db0cf2411eb drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-05-09 418 }
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 419 } else {
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 420 /* use msleep for most command */
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 421 for (sleep_total = 0;
8e95a2026f3b43 drivers/net/myri10ge/myri10ge.c Joe Perches 2009-12-03 422 sleep_total < 15 &&
8e95a2026f3b43 drivers/net/myri10ge/myri10ge.c Joe Perches 2009-12-03 423 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 424 sleep_total++)
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 425 msleep(1);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 426 }
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 427
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 428 result = ntohl(response->result);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 429 value = ntohl(response->data);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 430 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 431 if (result == 0) {
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 432 data->data0 = value;
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 433 return 0;
85a7ea1b0a3263 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-08-21 434 } else if (result == MXGEFW_CMD_UNKNOWN) {
85a7ea1b0a3263 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-08-21 435 return -ENOSYS;
5443e9ead4f53f drivers/net/myri10ge/myri10ge.c Brice Goglin 2007-05-07 436 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
5443e9ead4f53f drivers/net/myri10ge/myri10ge.c Brice Goglin 2007-05-07 437 return -E2BIG;
236bb5e649c2a7 drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-09-28 438 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
236bb5e649c2a7 drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-09-28 439 cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
236bb5e649c2a7 drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-09-28 440 (data->
236bb5e649c2a7 drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-09-28 441 data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
236bb5e649c2a7 drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-09-28 442 0) {
236bb5e649c2a7 drivers/net/myri10ge/myri10ge.c Brice Goglin 2008-09-28 443 return -ERANGE;
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 444 } else {
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 445 dev_err(&mgp->pdev->dev,
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 446 "command %d failed, result = %d\n",
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 447 cmd, result);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 448 return -ENXIO;
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 449 }
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 450 }
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 451
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 452 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 453 cmd, result);
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 454 return -EAGAIN;
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 455 }
0da34b6dfe5581 drivers/net/myri10ge/myri10ge.c Brice Goglin 2006-05-23 456
:::::: The code at line 390 was first introduced by commit
:::::: 0da34b6dfe55810ae60db57e08e2af8a808c0a55 [PATCH] Add Myri-10G Ethernet driver
:::::: TO: Brice Goglin <brice@...i.com>
:::::: CC: Jeff Garzik <jeff@...zik.org>
---
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