6.7-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiri Pirko <jiri@xxxxxxxxxx>
[ Upstream commit 58086721b7781c3e35b19c9b78c8f5a791070ba3 ]
In case devlink_rel_nested_in_notify_work() can not take the devlink
lock mutex. Convert the work to delayed work and in case of reschedule
do it jiffie later and avoid potential looping.
Suggested-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Fixes: c137743bce02 ("devlink: introduce object and nested devlink relationship infra")
Signed-off-by: Jiri Pirko <jiri@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240205171114.338679-1-jiri@xxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/devlink/core.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/net/devlink/core.c b/net/devlink/core.c
index 6984877e9f10..cbf8560c9375 100644
--- a/net/devlink/core.c
+++ b/net/devlink/core.c
@@ -46,7 +46,7 @@ struct devlink_rel {
u32 obj_index;
devlink_rel_notify_cb_t *notify_cb;
devlink_rel_cleanup_cb_t *cleanup_cb;
- struct work_struct notify_work;
+ struct delayed_work notify_work;
} nested_in;
};
@@ -70,7 +70,7 @@ static void __devlink_rel_put(struct devlink_rel *rel)
static void devlink_rel_nested_in_notify_work(struct work_struct *work)
{
struct devlink_rel *rel = container_of(work, struct devlink_rel,
- nested_in.notify_work);
+ nested_in.notify_work.work);
struct devlink *devlink;
devlink = devlinks_xa_get(rel->nested_in.devlink_index);
@@ -96,13 +96,13 @@ static void devlink_rel_nested_in_notify_work(struct work_struct *work)
return;
reschedule_work:
- schedule_work(&rel->nested_in.notify_work);
+ schedule_delayed_work(&rel->nested_in.notify_work, 1);
}
static void devlink_rel_nested_in_notify_work_schedule(struct devlink_rel *rel)
{
__devlink_rel_get(rel);
- schedule_work(&rel->nested_in.notify_work);
+ schedule_delayed_work(&rel->nested_in.notify_work, 0);
}
static struct devlink_rel *devlink_rel_alloc(void)
@@ -123,8 +123,8 @@ static struct devlink_rel *devlink_rel_alloc(void)
}
refcount_set(&rel->refcount, 1);
- INIT_WORK(&rel->nested_in.notify_work,
- &devlink_rel_nested_in_notify_work);
+ INIT_DELAYED_WORK(&rel->nested_in.notify_work,
+ &devlink_rel_nested_in_notify_work);
return rel;
}
--
2.43.0
