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Wysocki" , Danilo Krummrich Cc: Biju Das , driver-core@lists.linux.dev, linux-kernel@vger.kernel.org, Geert Uytterhoeven , Prabhakar Mahadev Lad , Biju Das , linux-renesas-soc@vger.kernel.org Subject: [PATCH] Revert "driver core: Use mod_delayed_work to prevent lost deferred probe work" Date: Tue, 26 May 2026 13:03:04 +0100 Message-ID: <20260526120306.184283-1-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Biju Das Commit 1137838865bf ("driver core: Use mod_delayed_work to prevent lost deferred probe work") introduced below regression on Renesas SMARC RZ/G2L EVK: class_for_each_device called for class 'devlink' before it was registered WARNING: drivers/base/class.c:415 at class_for_each_device+0x12c/0x13c, CP= U#1: kworker/1:1/26 class_for_each_device+0x12c/0x13c (P) fw_devlink_probing_done+0x58/0xa0 deferred_probe_timeout_work_func+0x5c/0xb8 process_one_work+0x150/0x290 worker_thread+0x18c/0x300 kthread+0x114/0x120 Reverting the commit fixes the issue. Signed-off-by: Biju Das --- drivers/base/dd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 172a02a438a2..5799a60fd058 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -323,10 +323,12 @@ void deferred_probe_extend_timeout(void) * If the work hasn't been queued yet or if the work expired, don't * start a new one. */ - if (mod_delayed_work(system_wq, &deferred_probe_timeout_work, - driver_deferred_probe_timeout)) + if (cancel_delayed_work(&deferred_probe_timeout_work)) { + schedule_delayed_work(&deferred_probe_timeout_work, + driver_deferred_probe_timeout * HZ); pr_debug("Extended deferred probe timeout by %d secs\n", driver_deferred_probe_timeout); + } } =20 /** --=20 2.43.0