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driver core: Guard deferred probe timeout extension with delayed_work_pending()

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commit 557495bc87 upstream.

mod_delayed_work() unconditionally queues the work even when it wasn't
previously pending, which can fire the timeout prematurely or restart it
after it already fired. Add a delayed_work_pending() guard to restore
the originally intended semantics.

Premature firing calls fw_devlink_drivers_done() before all built-in
drivers have registered, causing fw_devlink to prematurely relax device
links for suppliers whose drivers haven't loaded yet.

Fixes: 1137838865 ("driver core: Use mod_delayed_work to prevent lost deferred probe work")
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/20260525012340.3860581-2-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Danilo Krummrich
2026-07-24 16:03:53 +02:00
committed by Greg Kroah-Hartman
parent d329ff4039
commit 2f48e29ce9
1 changed files with 2 additions and 1 deletions
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drivers/base/dd.c
+2 -1
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@@ -326,7 +326,8 @@ 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,
if (delayed_work_pending(&deferred_probe_timeout_work) &&
mod_delayed_work(system_wq, &deferred_probe_timeout_work,
secs_to_jiffies(driver_deferred_probe_timeout)))
pr_debug("Extended deferred probe timeout by %d secs\n",
driver_deferred_probe_timeout);