Re: [PATCH v1 1/1] fpga: dfl: pci: Use pci_find_vsec_capability() when looking for DFL

From: kernel test robot
Date: Thu Nov 11 2021 - 23:26:37 EST

Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.15 next-20211111]
[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]

url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/fpga-dfl-pci-Use-pci_find_vsec_capability-when-looking-for-DFL/20211109-234228
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git d2f38a3c6507b2520101f9a3807ed98f1bdc545a
config: i386-buildonly-randconfig-r005-20211112 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 63ef0e17e28827eae53133b3467bdac7d9729318)
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://github.com/0day-ci/linux/commit/dfc10076ac7a63331954a33cabf94a1af3632210
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Andy-Shevchenko/fpga-dfl-pci-Use-pci_find_vsec_capability-when-looking-for-DFL/20211109-234228
git checkout dfc10076ac7a63331954a33cabf94a1af3632210
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/ sound/

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

All errors (new ones prefixed by >>):

>> drivers/fpga/dfl-pci.c:146:34: error: use of undeclared identifier 'dev'
voff = pci_find_vsec_capability(dev, PCI_VENDOR_ID_INTEL, PCI_VSEC_ID_INTEL_DFLS);
^
>> drivers/fpga/dfl-pci.c:350:32: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
if (!pci_set_dma_mask(pcidev, DMA_BIT_MASK(64))) {
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
drivers/fpga/dfl-pci.c:351:45: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(64));
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
3 errors generated.


vim +/dev +146 drivers/fpga/dfl-pci.c

138
139 static int find_dfls_by_vsec(struct pci_dev *pcidev, struct dfl_fpga_enum_info *info)
140 {
141 u32 bir, offset, dfl_cnt, dfl_res;
142 resource_size_t start, len;
143 int dfl_res_off, i, bars;
144 u16 voff;
145
> 146 voff = pci_find_vsec_capability(dev, PCI_VENDOR_ID_INTEL, PCI_VSEC_ID_INTEL_DFLS);
147 if (!voff) {
148 dev_dbg(&pcidev->dev, "%s no DFL VSEC found\n", __func__);
149 return -ENODEV;
150 }
151
152 dfl_cnt = 0;
153 pci_read_config_dword(pcidev, voff + PCI_VNDR_DFLS_CNT, &dfl_cnt);
154 if (dfl_cnt > PCI_STD_NUM_BARS) {
155 dev_err(&pcidev->dev, "%s too many DFLs %d > %d\n",
156 __func__, dfl_cnt, PCI_STD_NUM_BARS);
157 return -EINVAL;
158 }
159
160 dfl_res_off = voff + PCI_VNDR_DFLS_RES;
161 if (dfl_res_off + (dfl_cnt * sizeof(u32)) > PCI_CFG_SPACE_EXP_SIZE) {
162 dev_err(&pcidev->dev, "%s DFL VSEC too big for PCIe config space\n",
163 __func__);
164 return -EINVAL;
165 }
166
167 for (i = 0, bars = 0; i < dfl_cnt; i++, dfl_res_off += sizeof(u32)) {
168 dfl_res = GENMASK(31, 0);
169 pci_read_config_dword(pcidev, dfl_res_off, &dfl_res);
170
171 bir = dfl_res & PCI_VNDR_DFLS_RES_BAR_MASK;
172 if (bir >= PCI_STD_NUM_BARS) {
173 dev_err(&pcidev->dev, "%s bad bir number %d\n",
174 __func__, bir);
175 return -EINVAL;
176 }
177
178 if (bars & BIT(bir)) {
179 dev_err(&pcidev->dev, "%s DFL for BAR %d already specified\n",
180 __func__, bir);
181 return -EINVAL;
182 }
183
184 bars |= BIT(bir);
185
186 len = pci_resource_len(pcidev, bir);
187 offset = dfl_res & PCI_VNDR_DFLS_RES_OFF_MASK;
188 if (offset >= len) {
189 dev_err(&pcidev->dev, "%s bad offset %u >= %pa\n",
190 __func__, offset, &len);
191 return -EINVAL;
192 }
193
194 dev_dbg(&pcidev->dev, "%s BAR %d offset 0x%x\n", __func__, bir, offset);
195
196 len -= offset;
197
198 start = pci_resource_start(pcidev, bir) + offset;
199
200 dfl_fpga_enum_info_add_dfl(info, start, len);
201 }
202
203 return 0;
204 }
205

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

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