Re: [PATCH] mtd: rawnand: ndfc: use devm_platform_ioremap_resource
From: kernel test robot
Date: Mon Aug 24 2026 - 15:15:27 EST
Hi Rosen,
kernel test robot noticed the following build warnings:
[auto build test WARNING on v7.2]
[also build test WARNING on linus/master next-20260821]
[cannot apply to mtd/nand/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Rosen-Penev/mtd-rawnand-ndfc-use-devm_platform_ioremap_resource/20260822-154150
base: v7.2
patch link: https://lore.kernel.org/r/20260822224150.198749-1-rosenp%40gmail.com
patch subject: [PATCH] mtd: rawnand: ndfc: use devm_platform_ioremap_resource
config: nios2-allmodconfig (https://download.01.org/0day-ci/archive/20260825/202608250359.cFwVUqgE-lkp@xxxxxxxxx/config)
compiler: nios2-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260825/202608250359.cFwVUqgE-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/202608250359.cFwVUqgE-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
drivers/mtd/nand/raw/ndfc.c: In function 'ndfc_probe':
>> drivers/mtd/nand/raw/ndfc.c:192:13: warning: unused variable 'err' [-Wunused-variable]
192 | int err, len = 0;
| ^~~
vim +/err +192 drivers/mtd/nand/raw/ndfc.c
ce4c61f1848649 drivers/mtd/nand/ndfc.c Thomas Gleixner 2006-05-23 184
06f25510692385 drivers/mtd/nand/ndfc.c Bill Pemberton 2012-11-19 185 static int ndfc_probe(struct platform_device *ofdev)
ce4c61f1848649 drivers/mtd/nand/ndfc.c Thomas Gleixner 2006-05-23 186 {
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 187 struct ndfc_controller *ndfc;
dcd80db3efa82b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-08-22 188 void __iomem *ndfcbase;
766f271a63d1ee drivers/mtd/nand/ndfc.c Ian Munsie 2010-10-01 189 const __be32 *reg;
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 190 u32 ccr;
5828c60826e942 drivers/mtd/nand/ndfc.c Dan Carpenter 2014-07-31 191 u32 cs;
cceca8cb776b03 drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-06-13 @192 int err, len = 0;
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 193
dcd80db3efa82b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-08-22 194 ndfcbase = devm_platform_ioremap_resource(ofdev, 0);
dcd80db3efa82b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-08-22 195 if (IS_ERR(ndfcbase))
dcd80db3efa82b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-08-22 196 return PTR_ERR(ndfcbase);
dcd80db3efa82b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-08-22 197
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 198 /* Read the reg property to get the chip select */
61c7a080a5a061 drivers/mtd/nand/ndfc.c Grant Likely 2010-04-13 199 reg = of_get_property(ofdev->dev.of_node, "reg", &len);
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 200 if (reg == NULL || len != 12) {
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 201 dev_err(&ofdev->dev, "unable read reg property (%d)\n", len);
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 202 return -ENOENT;
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 203 }
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 204
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 205 cs = be32_to_cpu(reg[0]);
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 206 if (cs >= NDFC_MAX_CS) {
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 207 dev_err(&ofdev->dev, "invalid CS number (%d)\n", cs);
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 208 return -EINVAL;
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 209 }
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 210
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 211 ndfc = &ndfc_ctrl[cs];
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 212 ndfc->chip_select = cs;
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 213
7da45139d264f3 drivers/mtd/nand/raw/ndfc.c Miquel Raynal 2018-07-17 214 nand_controller_init(&ndfc->ndfc_control);
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 215 ndfc->ofdev = ofdev;
410fe2f02630fa drivers/mtd/nand/ndfc.c Felix Radensky 2011-04-26 216 dev_set_drvdata(&ofdev->dev, ndfc);
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 217
dcd80db3efa82b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-08-22 218 ndfc->ndfcbase = ndfcbase;
ce4c61f1848649 drivers/mtd/nand/ndfc.c Thomas Gleixner 2006-05-23 219
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 220 ccr = NDFC_CCR_BS(ndfc->chip_select);
ce4c61f1848649 drivers/mtd/nand/ndfc.c Thomas Gleixner 2006-05-23 221
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 222 /* It is ok if ccr does not exist - just default to 0 */
61c7a080a5a061 drivers/mtd/nand/ndfc.c Grant Likely 2010-04-13 223 reg = of_get_property(ofdev->dev.of_node, "ccr", NULL);
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 224 if (reg)
766f271a63d1ee drivers/mtd/nand/ndfc.c Ian Munsie 2010-10-01 225 ccr |= be32_to_cpup(reg);
ce4c61f1848649 drivers/mtd/nand/ndfc.c Thomas Gleixner 2006-05-23 226
4f2692a5383e4b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-06-01 227 iowrite32be(ccr, ndfc->ndfcbase + NDFC_CCR);
ce4c61f1848649 drivers/mtd/nand/ndfc.c Thomas Gleixner 2006-05-23 228
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 229 /* Set the bank settings if given */
61c7a080a5a061 drivers/mtd/nand/ndfc.c Grant Likely 2010-04-13 230 reg = of_get_property(ofdev->dev.of_node, "bank-settings", NULL);
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 231 if (reg) {
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 232 int offset = NDFC_BCFG0 + (ndfc->chip_select << 2);
4f2692a5383e4b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-06-01 233 iowrite32be(be32_to_cpup(reg), ndfc->ndfcbase + offset);
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 234 }
a808ad3b0d2841 drivers/mtd/nand/ndfc.c Sean MacLennan 2008-12-10 235
dcd80db3efa82b drivers/mtd/nand/raw/ndfc.c Rosen Penev 2026-08-22 236 return ndfc_chip_init(ndfc, ofdev->dev.of_node);
ce4c61f1848649 drivers/mtd/nand/ndfc.c Thomas Gleixner 2006-05-23 237 }
ce4c61f1848649 drivers/mtd/nand/ndfc.c Thomas Gleixner 2006-05-23 238
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