diff options
| -rw-r--r-- | drivers/base/devres.c | 42 | ||||
| -rw-r--r-- | include/linux/device.h | 4 |
2 files changed, 46 insertions, 0 deletions
diff --git a/drivers/base/devres.c b/drivers/base/devres.c index 2360adb..8731979 100644 --- a/drivers/base/devres.c +++ b/drivers/base/devres.c @@ -144,6 +144,48 @@ EXPORT_SYMBOL_GPL(devres_alloc); #endif /** + * devres_for_each_res - Resource iterator + * @dev: Device to iterate resource from + * @release: Look for resources associated with this release function + * @match: Match function (optional) + * @match_data: Data for the match function + * @fn: Function to be called for each matched resource. + * @data: Data for @fn, the 3rd parameter of @fn + * + * Call @fn for each devres of @dev which is associated with @release + * and for which @match returns 1. + * + * RETURNS: + * void + */ +void devres_for_each_res(struct device *dev, dr_release_t release, + dr_match_t match, void *match_data, + void (*fn)(struct device *, void *, void *), + void *data) +{ + struct devres_node *node; + struct devres_node *tmp; + unsigned long flags; + + if (!fn) + return; + + spin_lock_irqsave(&dev->devres_lock, flags); + list_for_each_entry_safe_reverse(node, tmp, + &dev->devres_head, entry) { + struct devres *dr = container_of(node, struct devres, node); + + if (node->release != release) + continue; + if (match && !match(dev, dr->data, match_data)) + continue; + fn(dev, dr->data, data); + } + spin_unlock_irqrestore(&dev->devres_lock, flags); +} +EXPORT_SYMBOL_GPL(devres_for_each_res); + +/** * devres_free - Free device resource data * @res: Pointer to devres data to free * diff --git a/include/linux/device.h b/include/linux/device.h index 52a5f15..ecd9006 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -536,6 +536,10 @@ extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp, #else extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp); #endif +extern void devres_for_each_res(struct device *dev, dr_release_t release, + dr_match_t match, void *match_data, + void (*fn)(struct device *, void *, void *), + void *data); extern void devres_free(void *res); extern void devres_add(struct device *dev, void *res); extern void *devres_find(struct device *dev, dr_release_t release, |
