这些龙芯电脑相关的设备驱动从来就不在主线，一直在 linux-loongson-community.git
里啊。看来在这里讨论合并的事情是无益的，我直接找 Alexandre Oliva 好了……
2014-07-08 8:45 GMT+08:00 Huacai Chen <chenhua...@gmail.com>:
> 我建议直接往kernel.org发吧，loongson-dev用来讨论问题就好，最终还是要往kernel.org去。
>
> On Mon, Jul 7, 2014 at 6:36 PM, Tom Li <biergaizi2...@gmail.com> wrote:
>> 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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