linux-kernel - [PATCH 2/2] driver core: Set default deferred_probe

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Message-Id: <20220603113138.2689444-2-gregkh@linuxfoundation.org>
Date:   Fri,  3 Jun 2022 13:31:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Saravana Kannan <saravanak@...gle.com>,
        Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 2/2] driver core: Set default deferred_probe_timeout back to 0.

From: Saravana Kannan <saravanak@...gle.com>

Since we had to effectively reverted
commit 35a672363ab3 ("driver core: Ensure wait_for_device_probe() waits
until the deferred_probe_timeout fires") in an earlier patch, a non-zero
deferred_probe_timeout will break NFS rootfs mounting [1] again. So, set
the default back to zero until we can fix that.

[1] - https://lore.kernel.org/lkml/TYAPR01MB45443DF63B9EF29054F7C41FD8C60@TYAPR01MB4544.jpnprd01.prod.outlook.com/

Fixes: 2b28a1a84a0e ("driver core: Extend deferred probe timeout on driver registration")
Cc: Mark Brown <broonie@...nel.org>
Cc: Rob Herring <robh@...nel.org>
Reported-by: Nathan Chancellor <nathan@...nel.org>
Reported-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Saravana Kannan <saravanak@...gle.com>
Link: https://lore.kernel.org/r/20220526034609.480766-3-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/base/dd.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 91f63cd33b12..251b5ba1b84a 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -256,12 +256,7 @@ static int deferred_devs_show(struct seq_file *s, void *data)
 }
 DEFINE_SHOW_ATTRIBUTE(deferred_devs);
 
-#ifdef CONFIG_MODULES
-int driver_deferred_probe_timeout = 10;
-#else
 int driver_deferred_probe_timeout;
-#endif
-
 EXPORT_SYMBOL_GPL(driver_deferred_probe_timeout);
 
 static int __init deferred_probe_timeout_setup(char *str)
-- 
2.36.1