Patch "usb: chipidea: move the lock initialization to core file" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    usb: chipidea: move the lock initialization to core file

to the 4.4-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:
     usb-chipidea-move-the-lock-initialization-to-core-file.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From a5d906bb261cde5f881a949d3b0fbaa285dcc574 Mon Sep 17 00:00:00 2001
From: Peter Chen <peter.chen@nxp.com>
Date: Tue, 15 Nov 2016 18:05:33 +0800
Subject: usb: chipidea: move the lock initialization to core file

From: Peter Chen <peter.chen@nxp.com>

commit a5d906bb261cde5f881a949d3b0fbaa285dcc574 upstream.

This can fix below dump when the lock is accessed at host
mode due to it is not initialized.

[   46.119638] INFO: trying to register non-static key.
[   46.124643] the code is fine but needs lockdep annotation.
[   46.130144] turning off the locking correctness validator.
[   46.135659] CPU: 0 PID: 690 Comm: cat Not tainted 4.9.0-rc3-00079-g4b75f1d #1210
[   46.143075] Hardware name: Freescale i.MX6 SoloX (Device Tree)
[   46.148923] Backtrace:
[   46.151448] [<c010c460>] (dump_backtrace) from [<c010c658>] (show_stack+0x18/0x1c)
[   46.159038]  r7:edf52000
[   46.161412]  r6:60000193
[   46.163967]  r5:00000000
[   46.165035]  r4:c0e25c2c

[   46.169109] [<c010c640>] (show_stack) from [<c03f58a4>] (dump_stack+0xb4/0xe8)
[   46.176362] [<c03f57f0>] (dump_stack) from [<c016d690>] (register_lock_class+0x4fc/0x56c)
[   46.184554]  r10:c0e25d24
[   46.187014]  r9:edf53e70
[   46.189569]  r8:c1642444
[   46.190637]  r7:ee9da024
[   46.193191]  r6:00000000
[   46.194258]  r5:00000000
[   46.196812]  r4:00000000
[   46.199185]  r3:00000001

[   46.203259] [<c016d194>] (register_lock_class) from [<c0171294>] (__lock_acquire+0x80/0x10f0)
[   46.211797]  r10:c0e25d24
[   46.214257]  r9:edf53e70
[   46.216813]  r8:ee9da024
[   46.217880]  r7:c1642444
[   46.220435]  r6:edcd1800
[   46.221502]  r5:60000193
[   46.224057]  r4:00000000

[   46.227953] [<c0171214>] (__lock_acquire) from [<c01726c0>] (lock_acquire+0x74/0x94)
[   46.235710]  r10:00000001
[   46.238169]  r9:edf53e70
[   46.240723]  r8:edf53f80
[   46.241790]  r7:00000001
[   46.244344]  r6:00000001
[   46.245412]  r5:60000193
[   46.247966]  r4:00000000

[   46.251866] [<c017264c>] (lock_acquire) from [<c096c8fc>] (_raw_spin_lock_irqsave+0x40/0x54)
[   46.260319]  r7:ee1c6a00
[   46.262691]  r6:c062a570
[   46.265247]  r5:20000113
[   46.266314]  r4:ee9da014

[   46.270393] [<c096c8bc>] (_raw_spin_lock_irqsave) from [<c062a570>] (ci_port_test_show+0x2c/0x70)
[   46.279280]  r6:eebd2000
[   46.281652]  r5:ee9da010
[   46.284207]  r4:ee9da014

[   46.286810] [<c062a544>] (ci_port_test_show) from [<c0248d04>] (seq_read+0x1ac/0x4f8)
[   46.294655]  r9:edf53e70
[   46.297028]  r8:edf53f80
[   46.299583]  r7:ee1c6a00
[   46.300650]  r6:00000001
[   46.303205]  r5:00000000
[   46.304273]  r4:eebd2000
[   46.306850] [<c0248b58>] (seq_read) from [<c039e864>] (full_proxy_read+0x54/0x6c)
[   46.314348]  r10:00000000
[   46.316808]  r9:c0a6ad30
[   46.319363]  r8:edf53f80
[   46.320430]  r7:00020000
[   46.322986]  r6:b6de3000
[   46.324053]  r5:ee1c6a00
[   46.326607]  r4:c0248b58

[   46.330505] [<c039e810>] (full_proxy_read) from [<c021ec98>] (__vfs_read+0x34/0x118)
[   46.338262]  r9:edf52000
[   46.340635]  r8:c0107fc4
[   46.343190]  r7:00020000
[   46.344257]  r6:edf53f80
[   46.346812]  r5:c039e810
[   46.347879]  r4:ee1c6a00
[   46.350447] [<c021ec64>] (__vfs_read) from [<c021fbd0>] (vfs_read+0x8c/0x11c)
[   46.357597]  r9:edf52000
[   46.359969]  r8:c0107fc4
[   46.362524]  r7:edf53f80
[   46.363592]  r6:b6de3000
[   46.366147]  r5:ee1c6a00
[   46.367214]  r4:00020000
[   46.369782] [<c021fb44>] (vfs_read) from [<c0220a4c>] (SyS_read+0x4c/0xa8)
[   46.376672]  r8:c0107fc4
[   46.379045]  r7:00020000
[   46.381600]  r6:b6de3000
[   46.382667]  r5:ee1c6a00
[   46.385222]  r4:ee1c6a00

[   46.387817] [<c0220a00>] (SyS_read) from [<c0107e20>] (ret_fast_syscall+0x0/0x1c)
[   46.395314]  r7:00000003
[   46.397687]  r6:b6de3000
[   46.400243]  r5:00020000
[   46.401310]  r4:00020000

Fixes: 26c696c678c4 ("USB: Chipidea: rename struct ci13xxx variables from udc to ci")
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/chipidea/core.c |    1 +
 drivers/usb/chipidea/udc.c  |    2 --
 2 files changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -926,6 +926,7 @@ static int ci_hdrc_probe(struct platform
 	if (!ci)
 		return -ENOMEM;
 
+	spin_lock_init(&ci->lock);
 	ci->dev = dev;
 	ci->platdata = dev_get_platdata(dev);
 	ci->imx28_write_fix = !!(ci->platdata->flags &
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1884,8 +1884,6 @@ static int udc_start(struct ci_hdrc *ci)
 	struct usb_otg_caps *otg_caps = &ci->platdata->ci_otg_caps;
 	int retval = 0;
 
-	spin_lock_init(&ci->lock);
-
 	ci->gadget.ops          = &usb_gadget_ops;
 	ci->gadget.speed        = USB_SPEED_UNKNOWN;
 	ci->gadget.max_speed    = USB_SPEED_HIGH;


Patches currently in stable-queue which might be from peter.chen@nxp.com are

queue-4.4/usb-chipidea-move-the-lock-initialization-to-core-file.patch