不用管这个补丁了，我已经和 Alexandre Oliva 沟通了一周了。
2014-08-02 4:06 GMT+08:00 Wu Zhangjin <wuzhang...@gmail.com>:
> 现在是Alexandre Oliva在维护，如果Lemote有开发者有时间，也可以直接参与进来维护。
>
>
> On Wed, Jul 9, 2014 at 9:59 AM, Huacai Chen <chenhua...@gmail.com> wrote:
>>
>> 这个龙芯社区...就像你说的，比较的半死不活。
>> 严格来说，应该是爱好者的补丁先集成到 linux-loongson-community.git，然后由
>> linux-loongson-community.git的维护者推送到主线。
>> 但现在 linux-loongson-community.git的维护者已经不在龙芯了....
>> 所以，这个地方就讨论补丁本身的有效性和质量问题吧，至于合并，直接找 Alexandre Oliva更靠谱....
>>
>> On Tue, Jul 8, 2014 at 5:22 PM, Tom Li <biergaizi2...@gmail.com> wrote:
>> > 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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