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Message-ID: <202309232112.DZwHqSRn-lkp@intel.com>
Date: Sat, 23 Sep 2023 21:53:01 +0800
From: kernel test robot <lkp@...el.com>
To: Christoph Hellwig <hch@....de>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Rich Felker <dalias@...c.org>
Subject: drivers/message/fusion/mptspi.c:602:39: warning:
'spi_dev_pg0.NegotiatedParameters' is used uninitialized
Hi Christoph,
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: d90b0276af8f25a0b8ae081a30d1b2a61263393b
commit: cd57d07b1e4e08f95a27b59253b5c8a46abf4f29 sh: don't allow non-coherent DMA for NOMMU
date: 3 years, 1 month ago
config: sh-randconfig-s031-20211128 (https://download.01.org/0day-ci/archive/20230923/202309232112.DZwHqSRn-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230923/202309232112.DZwHqSRn-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309232112.DZwHqSRn-lkp@intel.com/
All warnings (new ones prefixed by >>):
cc1: warning: arch/sh/include/mach-r2d: No such file or directory [-Wmissing-include-dirs]
cc1: warning: arch/sh/include/mach-lboxre2: No such file or directory [-Wmissing-include-dirs]
cc1: warning: arch/sh/include/mach-r2d: No such file or directory [-Wmissing-include-dirs]
cc1: warning: arch/sh/include/mach-lboxre2: No such file or directory [-Wmissing-include-dirs]
In file included from include/linux/gfp.h:6,
from include/linux/umh.h:4,
from include/linux/kmod.h:9,
from include/linux/module.h:16,
from drivers/message/fusion/mptspi.c:47:
include/linux/mmzone.h: In function '__nr_to_section':
include/linux/mmzone.h:1213:13: warning: the comparison will always evaluate as 'true' for the address of 'mem_section' will never be NULL [-Waddress]
1213 | if (!mem_section[SECTION_NR_TO_ROOT(nr)])
| ^
include/linux/mmzone.h:1199:27: note: 'mem_section' declared here
1199 | extern struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT];
| ^~~~~~~~~~~
drivers/message/fusion/mptspi.c: In function 'mptspi_qcmd':
drivers/message/fusion/mptspi.c:797:58: warning: suggest braces around empty body in an 'if' statement [-Wempty-body]
797 | ddvprintk(ioc, scsi_print_command(SCpnt));
| ^
In file included from include/linux/byteorder/little_endian.h:5,
from arch/sh/include/uapi/asm/byteorder.h:6,
from arch/sh/include/asm/bitops.h:10,
from include/linux/bitops.h:29,
from include/linux/kernel.h:12,
from include/linux/list.h:9,
from include/linux/module.h:12:
drivers/message/fusion/mptspi.c: In function 'mptspi_read_parameters':
>> drivers/message/fusion/mptspi.c:602:39: warning: 'spi_dev_pg0.NegotiatedParameters' is used uninitialized [-Wuninitialized]
602 | nego = le32_to_cpu(spi_dev_pg0.NegotiatedParameters);
include/uapi/linux/byteorder/little_endian.h:34:51: note: in definition of macro '__le32_to_cpu'
34 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
| ^
drivers/message/fusion/mptspi.c:602:16: note: in expansion of macro 'le32_to_cpu'
602 | nego = le32_to_cpu(spi_dev_pg0.NegotiatedParameters);
| ^~~~~~~~~~~
drivers/message/fusion/mptspi.c:598:43: note: 'spi_dev_pg0' declared here
598 | struct _CONFIG_PAGE_SCSI_DEVICE_0 spi_dev_pg0;
| ^~~~~~~~~~~
vim +602 drivers/message/fusion/mptspi.c
c92f222e1f1458 James Bottomley 2006-03-01 594
c92f222e1f1458 James Bottomley 2006-03-01 595 static void mptspi_read_parameters(struct scsi_target *starget)
c92f222e1f1458 James Bottomley 2006-03-01 596 {
c92f222e1f1458 James Bottomley 2006-03-01 597 int nego;
bc6e089a13a5c0 Eric Moore 2007-09-29 598 struct _CONFIG_PAGE_SCSI_DEVICE_0 spi_dev_pg0;
c92f222e1f1458 James Bottomley 2006-03-01 599
bc6e089a13a5c0 Eric Moore 2007-09-29 600 mptspi_read_spi_device_pg0(starget, &spi_dev_pg0);
c92f222e1f1458 James Bottomley 2006-03-01 601
bc6e089a13a5c0 Eric Moore 2007-09-29 @602 nego = le32_to_cpu(spi_dev_pg0.NegotiatedParameters);
c92f222e1f1458 James Bottomley 2006-03-01 603
c92f222e1f1458 James Bottomley 2006-03-01 604 spi_iu(starget) = (nego & MPI_SCSIDEVPAGE0_NP_IU) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 605 spi_dt(starget) = (nego & MPI_SCSIDEVPAGE0_NP_DT) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 606 spi_qas(starget) = (nego & MPI_SCSIDEVPAGE0_NP_QAS) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 607 spi_wr_flow(starget) = (nego & MPI_SCSIDEVPAGE0_NP_WR_FLOW) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 608 spi_rd_strm(starget) = (nego & MPI_SCSIDEVPAGE0_NP_RD_STRM) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 609 spi_rti(starget) = (nego & MPI_SCSIDEVPAGE0_NP_RTI) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 610 spi_pcomp_en(starget) = (nego & MPI_SCSIDEVPAGE0_NP_PCOMP_EN) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 611 spi_hold_mcs(starget) = (nego & MPI_SCSIDEVPAGE0_NP_HOLD_MCS) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 612 spi_period(starget) = (nego & MPI_SCSIDEVPAGE0_NP_NEG_SYNC_PERIOD_MASK) >> MPI_SCSIDEVPAGE0_NP_SHIFT_SYNC_PERIOD;
c92f222e1f1458 James Bottomley 2006-03-01 613 spi_offset(starget) = (nego & MPI_SCSIDEVPAGE0_NP_NEG_SYNC_OFFSET_MASK) >> MPI_SCSIDEVPAGE0_NP_SHIFT_SYNC_OFFSET;
c92f222e1f1458 James Bottomley 2006-03-01 614 spi_width(starget) = (nego & MPI_SCSIDEVPAGE0_NP_WIDE) ? 1 : 0;
c92f222e1f1458 James Bottomley 2006-03-01 615 }
c92f222e1f1458 James Bottomley 2006-03-01 616
:::::: The code at line 602 was first introduced by commit
:::::: bc6e089a13a5c0ac36247616baecd6fc77405e7f [SCSI] mpt fusion: Fix sparse warnings
:::::: TO: Eric Moore <eric.moore@....com>
:::::: CC: James Bottomley <jejb@...grave.localdomain>
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