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d789eb7a26
Commit 4f519feed0 ("phy: rockchip-inno-usb2: delay suspending
phy if plug out device"), introduced the following issue:
BUG: sleeping function called from invalid context at kernel/workqueue.c:2717
in_atomic(): 1, irqs_disabled(): 128, pid: 4, name: kworker/0:0
INFO: lockdep is turned off.
irq event stamp: 19674
hardirqs last enabled at (19673): [<ffffff8008cd8818>] _raw_spin_unlock_irqrestore+0x40/0x70
hardirqs last disabled at (19674): [<ffffff8008cd8690>] _raw_spin_lock_irq+0x1c/0x60
softirqs last enabled at (19664): [<ffffff80088dd1c0>] dw_mci_request+0xe0/0xf0
softirqs last disabled at (19660): [<ffffff80088dd140>] dw_mci_request+0x60/0xf0
CPU: 0 PID: 4 Comm: kworker/0:0 Not tainted 4.4.83 #69
Hardware name: Rockchip RK3399 Evaluation Board v3 (Android) (DT)
Workqueue: fusb302_wq fusb302_work_func
Call trace:
[<ffffff8008089f78>] dump_backtrace+0x0/0x1cc
[<ffffff800808a158>] show_stack+0x14/0x1c
[<ffffff80083ca33c>] dump_stack+0xb8/0xf4
[<ffffff80080cec40>] ___might_sleep+0x1b8/0x1c8
[<ffffff80080cecc0>] __might_sleep+0x70/0x80
[<ffffff80080becbc>] flush_work+0x74/0x270
[<ffffff80080bf09c>] __cancel_work_timer+0x12c/0x1bc
[<ffffff80080bf154>] cancel_delayed_work_sync+0x10/0x18
[<ffffff80083f9de8>] rockchip_otg_event+0x18/0x3c
[<ffffff80080c6380>] notifier_call_chain+0x54/0x88
[<ffffff80080c63dc>] raw_notifier_call_chain+0x14/0x1c
[<ffffff80089a5354>] extcon_sync+0x74/0x1c4
[<ffffff80085ab980>] platform_fusb_notify+0x184/0x204
[<ffffff80085ac4ac>] set_state_unattached+0x5c/0x90
[<ffffff80085ac85c>] fusb302_work_func+0x288/0x1904
[<ffffff80080bdfa4>] process_one_work+0x354/0x6d0
[<ffffff80080bf4a4>] worker_thread+0x2f8/0x414
[<ffffff80080c4e58>] kthread+0xf0/0xf8
[<ffffff80080828d0>] ret_from_fork+0x10/0x40
Actually, we don't need to cancel the otg_sm_work in the
event EXTCON_USB_HOST notifier_call. So just remove the
cancel_delayed_work_sync() in the rockchip_otg_event().
With this patch, we may get USB BC1.2 detection error
if plug in USB peripheral/host cable alternately and
quickly. So we need to reinit chg_state and chg_type
if OTG host cable plug in.
Change-Id: I349d59de3188d39707c527acb858a7be20a999ac
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Linux kernel
============
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In order to build the documentation, use ``make htmldocs`` or
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https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
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See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
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the problems which may result by upgrading your kernel.