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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ce657b1cdd
The component helper treats the void match data pointer as an opaque object which needs no further management. When device nodes being passed, this is not true: the caller should pass its refcount to the component helper, and there should be a way to drop the refcount when the matching information is destroyed. This patch provides a per-match release method in addition to the match method to solve this issue. Rather than using component_match_add(), users should use component_match_add_release() which takes an additional function pointer for releasing this reference. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
#ifndef COMPONENT_H
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#define COMPONENT_H
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#include <linux/stddef.h>
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struct device;
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struct component_ops {
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int (*bind)(struct device *comp, struct device *master,
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void *master_data);
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void (*unbind)(struct device *comp, struct device *master,
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void *master_data);
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};
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int component_add(struct device *, const struct component_ops *);
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void component_del(struct device *, const struct component_ops *);
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int component_bind_all(struct device *master, void *master_data);
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void component_unbind_all(struct device *master, void *master_data);
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struct master;
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struct component_master_ops {
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int (*bind)(struct device *master);
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void (*unbind)(struct device *master);
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};
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void component_master_del(struct device *,
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const struct component_master_ops *);
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struct component_match;
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int component_master_add_with_match(struct device *,
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const struct component_master_ops *, struct component_match *);
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void component_match_add_release(struct device *master,
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struct component_match **matchptr,
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void (*release)(struct device *, void *),
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int (*compare)(struct device *, void *), void *compare_data);
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static inline void component_match_add(struct device *master,
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struct component_match **matchptr,
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int (*compare)(struct device *, void *), void *compare_data)
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{
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component_match_add_release(master, matchptr, NULL, compare,
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compare_data);
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}
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#endif
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