This is a note to let you know that I've just added the patch titled
pinctrl: baytrail: Fix lockdep
to the 4.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-baytrail-fix-lockdep.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a171bc51fa697021e1b2082d7e95c12a363bc0a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Mon, 3 Oct 2016 17:56:55 +0300
Subject: pinctrl: baytrail: Fix lockdep
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From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
commit a171bc51fa697021e1b2082d7e95c12a363bc0a9 upstream.
Initialize the spinlock before using it.
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.8.0-dwc-bisect #4
Hardware name: Intel Corp. VALLEYVIEW C0 PLATFORM/BYT-T FFD8, BIOS BLAKFF81.X64.0088.R10.1403240443 FFD8_X64_R_2014_13_1_00 03/24/2014
0000000000000000 ffff8800788ff770 ffffffff8133d597 0000000000000000
0000000000000000 ffff8800788ff7e0 ffffffff810cfb9e 0000000000000002
ffff8800788ff7d0 ffffffff8205b600 0000000000000002 ffff8800788ff7f0
Call Trace:
[<ffffffff8133d597>] dump_stack+0x67/0x90
[<ffffffff810cfb9e>] register_lock_class+0x52e/0x540
[<ffffffff810d2081>] __lock_acquire+0x81/0x16b0
[<ffffffff810cede1>] ? save_trace+0x41/0xd0
[<ffffffff810d33b2>] ? __lock_acquire+0x13b2/0x16b0
[<ffffffff810cf05a>] ? __lock_is_held+0x4a/0x70
[<ffffffff810d3b1a>] lock_acquire+0xba/0x220
[<ffffffff8136f1fe>] ? byt_gpio_get_direction+0x3e/0x80
[<ffffffff81631567>] _raw_spin_lock_irqsave+0x47/0x60
[<ffffffff8136f1fe>] ? byt_gpio_get_direction+0x3e/0x80
[<ffffffff8136f1fe>] byt_gpio_get_direction+0x3e/0x80
[<ffffffff813740a9>] gpiochip_add_data+0x319/0x7d0
[<ffffffff81631723>] ? _raw_spin_unlock_irqrestore+0x43/0x70
[<ffffffff8136fe3b>] byt_pinctrl_probe+0x2fb/0x620
[<ffffffff8142fb0c>] platform_drv_probe+0x3c/0xa0
...
Based on the diff it looks like the problem was introduced in
commit 71e6ca61e826 ("pinctrl: baytrail: Register pin control handling")
but I wasn't able to verify that empirically as the parent commit
just oopsed when I tried to boot it.
Cc: Cristina Ciocan <cristina.ciocan@xxxxxxxxx>
Fixes: 71e6ca61e826 ("pinctrl: baytrail: Register pin control handling")
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pinctrl/intel/pinctrl-baytrail.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/pinctrl/intel/pinctrl-baytrail.c
+++ b/drivers/pinctrl/intel/pinctrl-baytrail.c
@@ -1808,6 +1808,8 @@ static int byt_pinctrl_probe(struct plat
return PTR_ERR(vg->pctl_dev);
}
+ raw_spin_lock_init(&vg->lock);
+
ret = byt_gpio_probe(vg);
if (ret) {
pinctrl_unregister(vg->pctl_dev);
@@ -1815,7 +1817,6 @@ static int byt_pinctrl_probe(struct plat
}
platform_set_drvdata(pdev, vg);
- raw_spin_lock_init(&vg->lock);
pm_runtime_enable(&pdev->dev);
return 0;
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-4.8/x86-boot-smp-don-t-try-to-poke-disabled-non-existent-apic.patch
queue-4.8/pinctrl-baytrail-fix-lockdep.patch
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