drivers/scsi/ncr53c8xx.c:5306:9: sparse: sparse: cast truncates bits from constant value (58f becomes 8f)

From: kbuild test robot
Date: Fri May 15 2020 - 14:21:23 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 051e6b7e34b9bd24f46725f74994a4d3a653966e
commit: 06e85c7e9a1c1356038936566fc23f7c0d363b96 asm-generic: fix unistd_32.h generation format
date: 5 weeks ago
reproduce:
# apt-get install sparse
# sparse version: v0.6.1-193-gb8fad4bc-dirty
git checkout 06e85c7e9a1c1356038936566fc23f7c0d363b96
make ARCH=x86_64 allmodconfig
make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

sparse warnings: (new ones prefixed by >>)

>> drivers/scsi/ncr53c8xx.c:5306:9: sparse: sparse: cast truncates bits from constant value (58f becomes 8f)

vim +5306 drivers/scsi/ncr53c8xx.c

^1da177e4c3f41 Linus Torvalds 2005-04-16 5243
^1da177e4c3f41 Linus Torvalds 2005-04-16 5244 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5245 ** Start at first entry.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5246 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5247 np->script0->done_pos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np,done_queue));
^1da177e4c3f41 Linus Torvalds 2005-04-16 5248 np->ccb_done_ic = MAX_DONE-1;
^1da177e4c3f41 Linus Torvalds 2005-04-16 5249 np->scripth0->done_queue[5*(MAX_DONE-1) + 4] =
^1da177e4c3f41 Linus Torvalds 2005-04-16 5250 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug));
^1da177e4c3f41 Linus Torvalds 2005-04-16 5251
^1da177e4c3f41 Linus Torvalds 2005-04-16 5252 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5253 ** Wakeup all pending jobs.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5254 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5255 ncr_wakeup (np, code);
^1da177e4c3f41 Linus Torvalds 2005-04-16 5256
^1da177e4c3f41 Linus Torvalds 2005-04-16 5257 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5258 ** Init chip.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5259 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5260
^1da177e4c3f41 Linus Torvalds 2005-04-16 5261 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5262 ** Remove reset; big delay because the 895 needs time for the
^1da177e4c3f41 Linus Torvalds 2005-04-16 5263 ** bus mode to settle
^1da177e4c3f41 Linus Torvalds 2005-04-16 5264 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5265 ncr_chip_reset(np, 2000);
^1da177e4c3f41 Linus Torvalds 2005-04-16 5266
^1da177e4c3f41 Linus Torvalds 2005-04-16 5267 OUTB (nc_scntl0, np->rv_scntl0 | 0xc0);
^1da177e4c3f41 Linus Torvalds 2005-04-16 5268 /* full arb., ena parity, par->ATN */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5269 OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5270
^1da177e4c3f41 Linus Torvalds 2005-04-16 5271 ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5272
^1da177e4c3f41 Linus Torvalds 2005-04-16 5273 OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5274 OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5275 OUTB (nc_istat , SIGP ); /* Signal Process */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5276 OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5277 OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5278
^1da177e4c3f41 Linus Torvalds 2005-04-16 5279 OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5280 OUTB (nc_ctest0, np->rv_ctest0); /* 720: CDIS and EHP */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5281 OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5282 OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5283
^1da177e4c3f41 Linus Torvalds 2005-04-16 5284 OUTB (nc_stest2, EXT|np->rv_stest2); /* Extended Sreq/Sack filtering */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5285 OUTB (nc_stest3, TE); /* TolerANT enable */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5286 OUTB (nc_stime0, 0x0c ); /* HTH disabled STO 0.25 sec */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5287
^1da177e4c3f41 Linus Torvalds 2005-04-16 5288 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5289 ** Disable disconnects.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5290 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5291
^1da177e4c3f41 Linus Torvalds 2005-04-16 5292 np->disc = 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 5293
^1da177e4c3f41 Linus Torvalds 2005-04-16 5294 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5295 ** Enable GPIO0 pin for writing if LED support.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5296 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5297
^1da177e4c3f41 Linus Torvalds 2005-04-16 5298 if (np->features & FE_LED0) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 5299 OUTOFFB (nc_gpcntl, 0x01);
^1da177e4c3f41 Linus Torvalds 2005-04-16 5300 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 5301
^1da177e4c3f41 Linus Torvalds 2005-04-16 5302 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5303 ** enable ints
^1da177e4c3f41 Linus Torvalds 2005-04-16 5304 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5305
^1da177e4c3f41 Linus Torvalds 2005-04-16 @5306 OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR);
^1da177e4c3f41 Linus Torvalds 2005-04-16 5307 OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID);
^1da177e4c3f41 Linus Torvalds 2005-04-16 5308
^1da177e4c3f41 Linus Torvalds 2005-04-16 5309 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5310 ** Fill in target structure.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5311 ** Reinitialize usrsync.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5312 ** Reinitialize usrwide.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5313 ** Prepare sync negotiation according to actual SCSI bus mode.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5314 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5315
^1da177e4c3f41 Linus Torvalds 2005-04-16 5316 for (i=0;i<MAX_TARGET;i++) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 5317 struct tcb *tp = &np->target[i];
^1da177e4c3f41 Linus Torvalds 2005-04-16 5318
^1da177e4c3f41 Linus Torvalds 2005-04-16 5319 tp->sval = 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 5320 tp->wval = np->rv_scntl3;
^1da177e4c3f41 Linus Torvalds 2005-04-16 5321
^1da177e4c3f41 Linus Torvalds 2005-04-16 5322 if (tp->usrsync != 255) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 5323 if (tp->usrsync <= np->maxsync) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 5324 if (tp->usrsync < np->minsync) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 5325 tp->usrsync = np->minsync;
^1da177e4c3f41 Linus Torvalds 2005-04-16 5326 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 5327 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 5328 else
^1da177e4c3f41 Linus Torvalds 2005-04-16 5329 tp->usrsync = 255;
^1da177e4c3f41 Linus Torvalds 2005-04-16 5330 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 5331
^1da177e4c3f41 Linus Torvalds 2005-04-16 5332 if (tp->usrwide > np->maxwide)
^1da177e4c3f41 Linus Torvalds 2005-04-16 5333 tp->usrwide = np->maxwide;
^1da177e4c3f41 Linus Torvalds 2005-04-16 5334
^1da177e4c3f41 Linus Torvalds 2005-04-16 5335 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 5336
^1da177e4c3f41 Linus Torvalds 2005-04-16 5337 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 5338 ** Start script processor.
^1da177e4c3f41 Linus Torvalds 2005-04-16 5339 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 5340 if (np->paddr2) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 5341 if (bootverbose)
^1da177e4c3f41 Linus Torvalds 2005-04-16 5342 printk ("%s: Downloading SCSI SCRIPTS.\n",
^1da177e4c3f41 Linus Torvalds 2005-04-16 5343 ncr_name(np));
^1da177e4c3f41 Linus Torvalds 2005-04-16 5344 OUTL (nc_scratcha, vtobus(np->script0));
^1da177e4c3f41 Linus Torvalds 2005-04-16 5345 OUTL_DSP (NCB_SCRIPTH_PHYS (np, start_ram));
^1da177e4c3f41 Linus Torvalds 2005-04-16 5346 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 5347 else
^1da177e4c3f41 Linus Torvalds 2005-04-16 5348 OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
^1da177e4c3f41 Linus Torvalds 2005-04-16 5349 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 5350

:::::: The code at line 5306 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Next message: Mark Brown: "Re: [PATCH v2 00/19] spi: dw: Add generic DW DMA controller support"
Previous message: Eric W. Biederman: "Re: linux-next boot error: general protection fault in tomoyo_get_local_path"
Next in thread: Matthew Wilcox: "Re: drivers/scsi/ncr53c8xx.c:5306:9: sparse: sparse: cast truncates bits from constant value (58f becomes 8f)"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]