[PATCH 1/4] of: add struct page support to rmem

[Dan Carpenter]

Hi Li,

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Li-Chen/add-struct-page-and-Direct-I-O-support-to-reserved-memory/20220711-202957
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: nios2-randconfig-m031-20220717 (https://download.01.org/0day-ci/archive/20220718/202207181758.YyEzUSPl-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 12.1.0

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp at intel.com>
Reported-by: Dan Carpenter <dan.carpenter at oracle.com>

smatch warnings:
drivers/of/of_reserved_mem.c:472 get_reserved_mem_from_dev() error: passing non negative 22 to ERR_PTR

vim +472 drivers/of/of_reserved_mem.c

8b66b4b9614f1c7 Li Chen 2022-07-11  457  struct reserved_mem *get_reserved_mem_from_dev(struct device *dev)
8b66b4b9614f1c7 Li Chen 2022-07-11  458  {
8b66b4b9614f1c7 Li Chen 2022-07-11  459  	struct device_node *np = dev_of_node(dev);
8b66b4b9614f1c7 Li Chen 2022-07-11  460  	struct device_node *rmem_np;
8b66b4b9614f1c7 Li Chen 2022-07-11  461  	struct reserved_mem *rmem = NULL;
8b66b4b9614f1c7 Li Chen 2022-07-11  462  
8b66b4b9614f1c7 Li Chen 2022-07-11  463  	rmem_np = of_parse_phandle(np, "memory-region", 0);
8b66b4b9614f1c7 Li Chen 2022-07-11  464  	if (!rmem_np) {
8b66b4b9614f1c7 Li Chen 2022-07-11  465  		dev_err(dev, "failed to get memory region node\n");
8b66b4b9614f1c7 Li Chen 2022-07-11  466  		return ERR_PTR(-ENODEV);
8b66b4b9614f1c7 Li Chen 2022-07-11  467  	}
8b66b4b9614f1c7 Li Chen 2022-07-11  468  
8b66b4b9614f1c7 Li Chen 2022-07-11  469  	rmem = of_reserved_mem_lookup(rmem_np);
8b66b4b9614f1c7 Li Chen 2022-07-11  470  	if (!rmem) {
8b66b4b9614f1c7 Li Chen 2022-07-11  471  		dev_err(dev, "Failed to lookup reserved memory\n");
8b66b4b9614f1c7 Li Chen 2022-07-11 @472  		return ERR_PTR(EINVAL);

Missing - character on -EINVAL.

8b66b4b9614f1c7 Li Chen 2022-07-11  473  	}
8b66b4b9614f1c7 Li Chen 2022-07-11  474  	return rmem;
8b66b4b9614f1c7 Li Chen 2022-07-11  475  }

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