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SubjectRe: [PATCH] nvmem: core: Set no-read-write provider to avoid userspace read/write
Hi Gaurav,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.0 next-20190306]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Gaurav-Kohli/nvmem-core-Set-no-read-write-provider-to-avoid-userspace-read-write/20190317-105219
config: i386-randconfig-s0-201910 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All errors (new ones prefixed by >>):

drivers//nvmem/core.c: In function 'nvmem_register':
>> drivers//nvmem/core.c:662:47: error: 'np' undeclared (first use in this function)
nvmem->no_read_write = of_property_read_bool(np, "no-read-write") |
^~
drivers//nvmem/core.c:662:47: note: each undeclared identifier is reported only once for each function it appears in

vim +/np +662 drivers//nvmem/core.c

602
603 /**
604 * nvmem_register() - Register a nvmem device for given nvmem_config.
605 * Also creates an binary entry in /sys/bus/nvmem/devices/dev-name/nvmem
606 *
607 * @config: nvmem device configuration with which nvmem device is created.
608 *
609 * Return: Will be an ERR_PTR() on error or a valid pointer to nvmem_device
610 * on success.
611 */
612
613 struct nvmem_device *nvmem_register(const struct nvmem_config *config)
614 {
615 struct nvmem_device *nvmem;
616 int rval;
617
618 if (!config->dev)
619 return ERR_PTR(-EINVAL);
620
621 nvmem = kzalloc(sizeof(*nvmem), GFP_KERNEL);
622 if (!nvmem)
623 return ERR_PTR(-ENOMEM);
624
625 rval = ida_simple_get(&nvmem_ida, 0, 0, GFP_KERNEL);
626 if (rval < 0) {
627 kfree(nvmem);
628 return ERR_PTR(rval);
629 }
630
631 kref_init(&nvmem->refcnt);
632 INIT_LIST_HEAD(&nvmem->cells);
633
634 nvmem->id = rval;
635 nvmem->owner = config->owner;
636 if (!nvmem->owner && config->dev->driver)
637 nvmem->owner = config->dev->driver->owner;
638 nvmem->stride = config->stride ?: 1;
639 nvmem->word_size = config->word_size ?: 1;
640 nvmem->size = config->size;
641 nvmem->dev.type = &nvmem_provider_type;
642 nvmem->dev.bus = &nvmem_bus_type;
643 nvmem->dev.parent = config->dev;
644 nvmem->priv = config->priv;
645 nvmem->type = config->type;
646 nvmem->reg_read = config->reg_read;
647 nvmem->reg_write = config->reg_write;
648 if (!config->no_of_node)
649 nvmem->dev.of_node = config->dev->of_node;
650
651 if (config->id == -1 && config->name) {
652 dev_set_name(&nvmem->dev, "%s", config->name);
653 } else {
654 dev_set_name(&nvmem->dev, "%s%d",
655 config->name ? : "nvmem",
656 config->name ? config->id : nvmem->id);
657 }
658
659 nvmem->read_only = device_property_present(config->dev, "read-only") ||
660 config->read_only || !nvmem->reg_write;
661
> 662 nvmem->no_read_write = of_property_read_bool(np, "no-read-write") |
663 config->read_only;
664 if (config->root_only)
665 nvmem->dev.groups = nvmem->read_only ?
666 nvmem_ro_root_dev_groups :
667 nvmem_rw_root_dev_groups;
668 else
669 nvmem->dev.groups = nvmem->read_only ?
670 nvmem_ro_dev_groups :
671 nvmem_rw_dev_groups;
672
673 device_initialize(&nvmem->dev);
674
675 dev_dbg(&nvmem->dev, "Registering nvmem device %s\n", config->name);
676
677 rval = device_add(&nvmem->dev);
678 if (rval)
679 goto err_put_device;
680
681 if (config->compat) {
682 rval = nvmem_setup_compat(nvmem, config);
683 if (rval)
684 goto err_device_del;
685 }
686
687 if (config->cells) {
688 rval = nvmem_add_cells(nvmem, config->cells, config->ncells);
689 if (rval)
690 goto err_teardown_compat;
691 }
692
693 rval = nvmem_add_cells_from_table(nvmem);
694 if (rval)
695 goto err_remove_cells;
696
697 rval = nvmem_add_cells_from_of(nvmem);
698 if (rval)
699 goto err_remove_cells;
700
701 blocking_notifier_call_chain(&nvmem_notifier, NVMEM_ADD, nvmem);
702
703 return nvmem;
704
705 err_remove_cells:
706 nvmem_device_remove_all_cells(nvmem);
707 err_teardown_compat:
708 if (config->compat)
709 device_remove_bin_file(nvmem->base_dev, &nvmem->eeprom);
710 err_device_del:
711 device_del(&nvmem->dev);
712 err_put_device:
713 put_device(&nvmem->dev);
714
715 return ERR_PTR(rval);
716 }
717 EXPORT_SYMBOL_GPL(nvmem_register);
718

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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