1. NAME▲

__check_region - check if a resource region is busy or free

2. SYNOPSIS ▲

int __check_region(struct resource *  parent , resource_size_t  start , resource_size_t  n );

3. ARGUMENTS ▲

parent
    parent resource descriptor

start
    resource start address

n
    resource region size

4. DESCRIPTION ▲

Returns 0 if the region is free at the moment it is checked, returns -EBUSY if the region is busy.

5. NOTE ▲

This function is deprecated because its use is racy. Even if it returns 0, a subsequent call to request_region may fail because another driver etc. just allocated the region. Do NOT use it. It will be removed from the kernel.

6. COPYRIGHT ▲