| Message ID | 20230613215440.2465708-2-vladimir.oltean@nxp.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | Improve the taprio qdisc's relationship with its children | expand |
| Context | Check | Description |
|---|---|---|
| netdev/series_format | success | Posting correctly formatted |
| netdev/tree_selection | success | Clearly marked for net-next, async |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 8 this patch: 8 |
| netdev/cc_maintainers | success | CCed 9 of 9 maintainers |
| netdev/build_clang | success | Errors and warnings before: 8 this patch: 8 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/deprecated_api | success | None detected |
| netdev/check_selftest | success | No net selftest shell script |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 8 this patch: 8 |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 23 lines checked |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c index c6627f5abdfa..3ee8a7cca786 100644 --- a/net/sched/sch_taprio.c +++ b/net/sched/sch_taprio.c @@ -2131,14 +2131,20 @@ static void taprio_attach(struct Qdisc *sch) /* Attach underlying qdisc */ for (ntx = 0; ntx < dev->num_tx_queues; ntx++) { - struct Qdisc *qdisc = q->qdiscs[ntx]; + struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, ntx); struct Qdisc *old; if (FULL_OFFLOAD_IS_ENABLED(q->flags)) { + struct Qdisc *qdisc = q->qdiscs[ntx]; + qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT; - old = dev_graft_qdisc(qdisc->dev_queue, qdisc); + old = dev_graft_qdisc(dev_queue, qdisc); } else { - old = dev_graft_qdisc(qdisc->dev_queue, sch); + /* In software mode, attach the root taprio qdisc + * to all netdev TX queues, so that dev_qdisc_enqueue() + * goes through taprio_enqueue(). + */ + old = dev_graft_qdisc(dev_queue, sch); qdisc_refcount_inc(sch); } if (old)
This is a simple code transformation with no intended behavior change, just to make it absolutely clear that q->qdiscs[] is only attached to the child taprio classes in full offload mode. Right now we use the q->qdiscs[] variable in taprio_attach() for software mode too, but that is quite confusing and avoidable. We use it only to reach the netdev TX queue, but we could as well just use netdev_get_tx_queue() for that. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> --- v1->v2: none net/sched/sch_taprio.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)