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 <[email protected]> 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 <[email protected]>: >> 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 <[email protected]> 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 <[email protected]>: >>>> Thanks, Huacai有空把patch合并进去么？ >>>> >>>> >>>> On Thu, Jul 3, 2014 at 10:23 PM, liu shiwei <[email protected]> wrote: >>>>> >>>>> 非常好！very good! >>>>> >>>>> 2014-7-3 上午7:55于 "Tom Li" <[email protected]>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); >>>>>> >>>>>> -- >>>>>> You received this 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