devm_request_resource (9) - Linux Manuals

devm_request_resource: request and reserve an I/O or memory resource

Command to display devm_request_resource manual in Linux: $ man 9 devm_request_resource

NAME

devm_request_resource - request and reserve an I/O or memory resource

SYNOPSIS

int devm_request_resource(struct device * dev, struct resource * root, struct resource * new);

ARGUMENTS

dev

: device for which to request the resource

root

: root of the resource tree from which to request the resource

new

: descriptor of the resource to request

DESCRIPTION

This is a device-managed version of request_resource. There is usually no need to release resources requested by this function explicitly since that will be taken care of when the device is unbound from its driver. If for some reason the resource needs to be released explicitly, because of ordering issues for example, drivers must call devm_release_resource rather than the regular release_resource.

When a conflict is detected between any existing resources and the newly requested resource, an error message will be printed.

Returns 0 on success or a negative error code on failure.