lib: logic_pio: Add logic_pio_unregister_range()
Add a function to unregister a logical PIO range. Logical PIO space can still be leaked when unregistering certain LOGIC_PIO_CPU_MMIO regions, but this acceptable for now since there are no callers to unregister LOGIC_PIO_CPU_MMIO regions, and the logical PIO region allocation scheme would need significant work to improve this. Cc: stable@vger.kernel.org Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Wei Xu <xuwei5@hisilicon.com>alistair/sunxi64-5.4-dsi
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0a27142bd1
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b884e2de2a
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@ -117,6 +117,7 @@ struct logic_pio_hwaddr *find_io_range_by_fwnode(struct fwnode_handle *fwnode);
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unsigned long logic_pio_trans_hwaddr(struct fwnode_handle *fwnode,
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unsigned long logic_pio_trans_hwaddr(struct fwnode_handle *fwnode,
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resource_size_t hw_addr, resource_size_t size);
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resource_size_t hw_addr, resource_size_t size);
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int logic_pio_register_range(struct logic_pio_hwaddr *newrange);
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int logic_pio_register_range(struct logic_pio_hwaddr *newrange);
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void logic_pio_unregister_range(struct logic_pio_hwaddr *range);
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resource_size_t logic_pio_to_hwaddr(unsigned long pio);
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resource_size_t logic_pio_to_hwaddr(unsigned long pio);
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unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr);
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unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr);
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@ -98,6 +98,20 @@ end_register:
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return ret;
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return ret;
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}
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}
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/**
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* logic_pio_unregister_range - unregister a logical PIO range for a host
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* @range: pointer to the IO range which has been already registered.
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*
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* Unregister a previously-registered IO range node.
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*/
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void logic_pio_unregister_range(struct logic_pio_hwaddr *range)
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{
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mutex_lock(&io_range_mutex);
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list_del_rcu(&range->list);
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mutex_unlock(&io_range_mutex);
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synchronize_rcu();
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}
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/**
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/**
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* find_io_range_by_fwnode - find logical PIO range for given FW node
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* find_io_range_by_fwnode - find logical PIO range for given FW node
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* @fwnode: FW node handle associated with logical PIO range
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* @fwnode: FW node handle associated with logical PIO range
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