idr: introduce idr_for_each_entry_continue_ul()

Similarly, other callers of idr_get_next_ul() suffer the same
overflow bug as they don't handle it properly either.

Introduce idr_for_each_entry_continue_ul() to help these callers
iterate from a given ID.

cls_flower needs more care here because it still has overflow when
does arg->cookie++, we have to fold its nested loops into one
and remove the arg->cookie++.

Fixes: 01683a146999 ("net: sched: refactor flower walk to iterate over idr")
Fixes: 12d6066c3b29 ("net/mlx5: Add flow counters idr")
Reported-by: Li Shuang <[email protected]>
Cc: Davide Caratti <[email protected]>
Cc: Vlad Buslov <[email protected]>
Cc: Chris Mi <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Tested-by: Davide Caratti <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

0 files changed, 0 insertions, 0 deletions