Hello Zhichang Yuan,
This is a semi-automatic email about new static checker warnings.
The patch 07a1cb330513: "lib: Add generic PIO mapping method" from
Mar 15, 2018, leads to the following Smatch complaint:
lib/logic_pio.c:42 logic_pio_register_range()
warn: variable dereferenced before check 'new_range' (see line 36)
lib/logic_pio.c
35 struct logic_pio_hwaddr *range;
36 resource_size_t start = new_range->hw_start;
^^^^^^^^^^^^^^^^^^^^
37 resource_size_t end = new_range->hw_start + new_range->size;
^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^
Dereference.
38 resource_size_t mmio_sz = 0;
39 resource_size_t iio_sz = MMIO_UPPER_LIMIT;
40 int ret = 0;
41
42 if (!new_range || !new_range->fwnode || !new_range->size)
^^^^^^^^^
Check for NULL.
43 return -EINVAL;
44
regards,
dan carpenter
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