Given the consumer and supplier devices, add an API to delete the link between them.
Suggested-by: Tomasz Figa <tf...@chromium.org> Signed-off-by: Vivek Gautam <vivek.gau...@codeaurora.org> Cc: Rafael J. Wysocki <r...@rjwysocki.net> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- - This patch replaces an earlier patch [1] that was adding device_link_find() API. [1] https://patchwork.kernel.org/patch/10277975/ drivers/base/core.c | 31 +++++++++++++++++++++++++++++++ include/linux/device.h | 1 + 2 files changed, 32 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index 5847364f25d9..e13d904e1e12 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -336,6 +336,37 @@ void device_link_del(struct device_link *link) } EXPORT_SYMBOL_GPL(device_link_del); +/** + * device_link_del_dev - Delete a link between two given devices + * @consumer: Consumer end of the link. + * @supplier: Supplier end of the link. + * + * The caller must ensure proper synchronization of this function with runtime + * PM. + */ +void device_link_del_dev(struct device *consumer, struct device *supplier) +{ + struct device_link *link; + + if (!consumer || !supplier) + return; + + device_links_write_lock(); + device_pm_lock(); + + list_for_each_entry(link, &supplier->links.consumers, s_node) { + if (link->consumer == consumer) { + __device_link_del(link); + /* just one link between the devices */ + break; + } + } + + device_pm_unlock(); + device_links_write_unlock(); +} +EXPORT_SYMBOL_GPL(device_link_del_dev); + static void device_links_missing_supplier(struct device *dev) { struct device_link *link; diff --git a/include/linux/device.h b/include/linux/device.h index b093405ed525..14508d843f67 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -1278,6 +1278,7 @@ extern const char *dev_driver_string(const struct device *dev); struct device_link *device_link_add(struct device *consumer, struct device *supplier, u32 flags); void device_link_del(struct device_link *link); +void device_link_del_dev(struct device *consumer, struct device *supplier); #ifdef CONFIG_PRINTK -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
