我曾经向这个邮件列表发了三个 patch，有一个是年初发的。这个补丁系列的 0/1 和 1/1 是前几天发的，希望都能合并进去。
感谢各位。
2014-07-07 17:06 GMT+08:00 Wu Zhangjin <wuzhang...@gmail.com>:
> Thanks, Huacai有空把patch合并进去么？
>
>
> On Thu, Jul 3, 2014 at 10:23 PM, liu shiwei <liushi...@gmail.com> wrote:
>>
>> 非常好！very good!
>>
>> 2014-7-3 上午7:55于 "Tom Li" <biergaizi2...@gmail.com>写道：
>>
>>> If ec_read hasn't been called, status will keep an uninitialized value.
>>> Then it will be pass to get_event_key_entry(), cause a kernel oops.
>>>
>>> [ 0.980000] usb 2-4: New USB device strings: Mfr=1, Product=2,
>>> SerialNumber=3
>>> [ 0.980000] usb 2-4: Product: RTL8187B_WLAN_Adapter
>>> [ 0.980000] usb 2-4: Manufacturer: Manufacturer_Realtek
>>> [ 0.980000] usb 2-4: SerialNumber: 00e04c000001
>>> [ 0.992000] (ffa/6)ec issued command 132 status : 0x9
>>> [ 1.504000] (ff8/8)ec issued command 132 status : 0x9
>>> [ 1.508000] CPU 0 Unable to handle kernel paging request at virtual
>>> address 0000000100000000, epc == 0000000100000000, ra == ffffffff80564994
>>> [ 1.508000] Oops[#1]:
>>> [ 1.508000] CPU: 0 PID: 34 Comm: irq/10-sci Not tainted
>>> 3.15.3-yeeloong-gaizi #2
>>> [ 1.508000] task: 98000000bf2b8000 ti: 98000000bf3ac000 task.ti:
>>> 98000000bf3ac000
>>> [ 1.508000] $ 0 : 0000000000000000 ffffffffcfffffff 0000000100000000
>>> 0000000000000000
>>> [ 1.508000] $ 4 : 00000000000000c4 0000010800000000 ffffffff809e4948
>>> 0000000000004e90
>>> [ 1.508000] $ 8 : 98000000bf2b8000 2064657573736920 00000000000000ee
>>> 7461747320323331
>>> [ 1.508000] $12 : fffffffffffffffe ffffffffffffffe0 0000000000000000
>>> ffffffff809e4948
>>> [ 1.508000] $16 : 0000000000000030 0000000000000030 00000000000000c4
>>> ffffffff80a00000
>>> [ 1.508000] $20 : ffffffff80280000 ffffffff802782c8 0000000000000001
>>> ffffffff809675d0
>>> [ 1.508000] $24 : 0000000000000000 00000000000031b0
>>> [ 1.508000] $28 : 98000000bf3ac000 98000000bf3afd80 ffffffff80950000
>>> ffffffff80564994
>>> [ 1.508000] Hi : 0000000000000108
>>> [ 1.508000] Lo : 0000000031aac000
>>> [ 1.508000] epc : 0000000100000000 0x100000000
>>> [ 1.508000] Not tainted
>>> [ 1.508000] ra : ffffffff80564994 sci_irq_handler+0xcc/0x1c8
>>> [ 1.508000] Status: 140044e3 KX SX UX KERNEL EXL IE
>>> [ 1.508000] Cause : 00008008
>>> [ 1.508000] BadVA : 0000000100000000
>>> [ 1.508000] PrId : 00006303 (ICT Loongson-2)
>>> [ 1.508000] Modules linked in:
>>> [ 1.508000] Process irq/10-sci (pid: 34, threadinfo=98000000bf3ac000,
>>> task=98000000bf2b8000, tls=0000000000000000)
>>> [ 1.508000] Stack : ffffffff80280000 98000000bf3a8000 ffffffff8095ded0
>>> 0000000000000001
>>> ffffffff8095ded0 ffffffff802782fc ffffffff80280000
>>> ffffffff802782c8
>>> 0000000000000001 0000000000000001 98000000bf3a8000
>>> ffffffff80278680
>>> 0000000000000000 ffffffff80278430 98000000bf3a8080
>>> ffffffff809d0000
>>> ffffffff808d0000 98000000bf3a8000 ffffffff80278538
>>> 98000000bf068780
>>> 98000000bf2b8780 ffffffff80258fd0 0000000000000000
>>> 0000000000000000
>>> 98000000bf3a8000 0000000000000000 98000000bf3afe50
>>> 98000000bf3afe50
>>> 0000000000000000 98000000bf3afe68 98000000bf3afe68
>>> 0000000000000000
>>> ffffffff80258ef0 98000000bf3a8080 ffffffff809e0000
>>> ffffffff809e0000
>>> 0000000000000000 ffffffff80206ea0 0000000000000000
>>> 0000000000000000
>>> ...
>>> [ 1.508000] Call Trace:
>>> [ 1.508000] [<ffffffff80280000>] rcu_process_callbacks+0x4d8/0x500
>>> [ 1.508000] [<ffffffff802782fc>] irq_thread_fn+0x34/0x78
>>> [ 1.508000] [<ffffffff80280000>] rcu_process_callbacks+0x4d8/0x500
>>> [ 1.508000] [<ffffffff802782c8>] irq_thread_fn+0x0/0x78
>>> [ 1.508000] [<ffffffff80278680>] irq_thread+0x148/0x190
>>> [ 1.508000] [<ffffffff80278430>] irq_thread_dtor+0x0/0x108
>>> [ 1.508000] [<ffffffff80278538>] irq_thread+0x0/0x190
>>> [ 1.508000] [<ffffffff80258fd0>] kthread+0xe0/0xf8
>>> [ 1.508000] [<ffffffff80258ef0>] kthread+0x0/0xf8
>>> [ 1.508000] [<ffffffff80206ea0>] ret_from_kernel_thread+0x20/0x28
>>>
>>> [ 1.508000]
>>> Code: (Bad address in epc)
>>>
>>> [ 1.512000] ---[ end trace d5332affd0d1c32e ]---
>>> [ 1.516000] CPU 0 Unable to handle kernel paging request at virtual
>>> address ffffffffffffffe0, epc == ffffffff802596c0, ra == ffffffff8027845c
>>> [ 1.520000] Oops[#2]:
>>> [ 1.520000] CPU: 0 PID: 34 Comm: irq/10-sci Tainted: G D
>>> 3.15.3-yeeloong-gaizi #2
>>> [ 1.520000] task: 98000000bf2b8000 ti: 98000000bf3ac000 task.ti:
>>> 98000000bf3ac000
>>> [ 1.520000] $ 0 : 0000000000000000 ffffffffcfffffff 0000000000000000
>>> 98000000bf3afde0
>>> [ 1.520000] $ 4 : 98000000bf2b8000 0000000000000000 0000000000000001
>>> 0000000000000000
>>> [ 1.520000] $ 8 : 0000000000000000 0000000000000000 0000000000000115
>>> 0000000000000001
>>> [ 1.520000] $12 : 0000000000000000 0000000000000000 0000000000000000
>>> 0000000000000000
>>> [ 1.520000] $16 : 98000000bf2b8000 98000000bf2b8618 98000000bf2b8000
>>> ffffffff809e0000
>>> [ 1.520000] $20 : 0000000000000000 0000000000000060 98000000bf2b8000
>>> 0000000000000001
>>> [ 1.520000] $24 : 0000000000000000 0000000000000000
>>> [ 1.520000] $28 : 98000000bf3ac000 98000000bf3afa70 ffffffff80950000
>>> ffffffff8027845c
>>> [ 1.520000] Hi : 0000000000000108
>>> [ 1.520000] Lo : 0000000031aac000
>>> [ 1.520000] epc : ffffffff802596c0 kthread_data+0x10/0x18
>>> [ 1.520000] Tainted: G D
>>> [ 1.520000] ra : ffffffff8027845c irq_thread_dtor+0x2c/0x108
>>> [ 1.520000] Status: 140044e3 KX SX UX KERNEL EXL IE
>>> [ 1.520000] Cause : 80008008
>>> [ 1.520000] BadVA : ffffffffffffffe0
>>> [ 1.520000] PrId : 00006303 (ICT Loongson-2)
>>> [ 1.520000] Modules linked in:
>>> [ 1.520000] Process irq/10-sci (pid: 34, threadinfo=98000000bf3ac000,
>>> task=98000000bf2b8000, tls=0000000000000000)
>>> [ 1.520000] Stack : 0000000000000000 ffffffff802782c8 000000000000000b
>>> 0000000000000000
>>> 98000000bf2b8618 ffffffff8025545c 000000000000000b
>>> 000000000000000b
>>> 000000000000000b ffffffff808d60c8 0000000000000000
>>> ffffffff80235fc8
>>> ffffffff80950000 ffffffff80631f14 98000000bf3afb08
>>> 0000000000000000
>>> 0000000000000001 ffffffff802350ac 98000000bf3afc50
>>> 000000000000000b
>>> ffffffff808d60c8 0000000000000000 ffffffff80280000
>>> ffffffff802782c8
>>> 0000000000000001 98000000bf3afc50 ffffffff80950000
>>> ffffffff8020cc84
>>> 0000000100000000 0000000000000000 98000000bf2b8000
>>> ffffffff8021c968
>>> 00030001bf3ac000 ffffffff809df420 ffffffffffff0000
>>> 0000000000000000
>>> 0000000000000002 ffffffff80239bc8 000000000000000a
>>> 00000000fffff7b6
>>> ...
>>> [ 1.520000] Call Trace:
>>> [ 1.520000] [<ffffffff802596c0>] kthread_data+0x10/0x18
>>> [ 1.520000] [<ffffffff8027845c>] irq_thread_dtor+0x2c/0x108
>>> [ 1.520000] [<ffffffff8025545c>] task_work_run+0xac/0x120
>>> [ 1.520000] [<ffffffff80235fc8>] do_exit+0x290/0x9b8
>>> [ 1.520000] [<ffffffff8020cc84>] die+0x13c/0x188
>>> [ 1.520000] [<ffffffff8021c968>] __do_page_fault+0x3b8/0x430
>>> [ 1.520000] [<ffffffff80206dc4>] resume_userspace_check+0x0/0x10
>>>
>>> [ 1.520000]
>>> Code: 3c01cfff 3421ffff 03e1f824 <03e00008> dc42ffe0 67bdffe0
>>> 24060008 ffbf0018 dc850290
>>> [ 1.524000] ---[ end trace d5332affd0d1c32f ]---
>>>
>>> The below patch fixes it.
>>>
>>> diff -uprN linux-3.15/drivers/platform/mips/yeeloong_laptop.c
>>> linux-3.15-fix-fn/drivers/platform/mips/yeeloong_laptop.c
>>> --- linux-3.15/drivers/platform/mips/yeeloong_laptop.c 2014-07-03
>>> 07:44:30.467523711 +0800
>>> +++ linux-3.15-fix-fn/drivers/platform/mips/yeeloong_laptop.c
>>> 2014-07-03 07:50:01.430236919 +0800
>>> @@ -978,7 +978,7 @@ static const struct sci_event se[] = {
>>>
>>> static void do_event_action(int event)
>>> {
>>> - int status;
>>> + int status = -1;
>>> struct key_entry *ke;
>>> struct sci_event *sep;
>>>
>>> @@ -987,6 +987,11 @@ static void do_event_action(int event)
>>> if (sep->reg != 0)
>>> status = ec_read(sep->reg);
>>>
>>> + if (status = -1) {
>>> + /* ec_read hasn't been called, status is invalid */
>>> + return;
>>> + }
>>> +
>>> if (sep->handler != NULL)
>>> status = sep->handler(status);
>>>
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