[PATCH 01/12] driver: core: allow modifying device_links flags

Nuno Sa via B4 Relay
2023-11-21T10:17:26Z

From: Nuno Sa <nuno.sa@analog.com>

If a device_link is previously created (eg: via
fw_devlink_create_devlink()) before the supplier + consumer are both
present and bound to their respective drivers, there's no way to set
DL_FLAG_AUTOREMOVE_CONSUMER anymore while one can still set
DL_FLAG_AUTOREMOVE_SUPPLIER. Hence, rework the flags checks to allow
for DL_FLAG_AUTOREMOVE_CONSUMER in the same way
DL_FLAG_AUTOREMOVE_SUPPLIER is done.

While at it, make sure that we are never left with
DL_FLAG_AUTOPROBE_CONSUMER set together with one of
DL_FLAG_AUTOREMOVE_CONSUMER or DL_FLAG_AUTOREMOVE_SUPPLIER.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
---
drivers/base/core.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 4d8b315c48a1..b6aac55c361d 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -806,11 +806,15 @@ struct device_link *device_link_add(struct device *consumer,
* update the existing link to stay around longer.
*/
if (flags & DL_FLAG_AUTOREMOVE_SUPPLIER) {
- if (link->flags & DL_FLAG_AUTOREMOVE_CONSUMER) {
- link->flags &= ~DL_FLAG_AUTOREMOVE_CONSUMER;
- link->flags |= DL_FLAG_AUTOREMOVE_SUPPLIER;
- }
- } else if (!(flags & DL_FLAG_AUTOREMOVE_CONSUMER)) {
+ link->flags &= ~DL_FLAG_AUTOREMOVE_CONSUMER;
+ link->flags &= ~DL_FLAG_AUTOPROBE_CONSUMER;
+ link->flags |= DL_FLAG_AUTOREMOVE_SUPPLIER;
+
+ } else if (flags & DL_FLAG_AUTOREMOVE_CONSUMER) {
+ link->flags &= ~DL_FLAG_AUTOREMOVE_SUPPLIER;
+ link->flags &= ~DL_FLAG_AUTOPROBE_CONSUMER;
+ link->flags |= DL_FLAG_AUTOREMOVE_CONSUMER;
+ } else {
link->flags &= ~(DL_FLAG_AUTOREMOVE_CONSUMER |
DL_FLAG_AUTOREMOVE_SUPPLIER);
}

--
2.42.1