RE: [Linuxarm] Re: [PATCH] input - mk712: fix the kernel crash while mk712 is selected

["Song Bao Hua (Barry Song)" <song.bao.hua@hisilicon.com>]

> -----Original Message-----
> From: Dmitry Torokhov [mailto:dmitry.torokhov@gmail.com]
> Sent: Tuesday, January 12, 2021 6:29 PM
> To: Song Bao Hua (Barry Song) <song.bao.hua@hisilicon.com>
> Cc: linux-input@vger.kernel.org; linuxarm@openeuler.org
> Subject: [Linuxarm] Re: [PATCH] input - mk712: fix the kernel crash while mk712
> is selected
> 
> On Fri, Jan 08, 2021 at 01:35:27PM +1300, Barry Song wrote:
> > While debugging other issues, I enabled mk712 then I got the below crash
> > during arm64 linux boot:
> > [    1.150412] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)
> > [    1.150541] pc : logic_outb+0x3c/0xa8
> > [    1.150657] lr : mk712_init+0x74/0x1ec
> > [    1.150745] sp : ffff800011efbd40
> > [    1.150950] x29: ffff800011efbd40 x28: 0000000000000000
> > [    1.151098] x27: ffff800011681078 x26: ffff8000115d04b8
> > [    1.151192] x25: ffff8000116ff6b4 x24: ffff8000115bac10
> > [    1.151287] x23: ffff800011dfa000 x22: ffff800011b8dbe0
> > [    1.151421] x21: ffff800011eac000 x20: 0000000000000000
> > [    1.151527] x19: fffffbfffe800266 x18: 0000000000000000
> > [    1.151674] x17: ffff800010a7bc38 x16: ffff800010a7b0e0
> > [    1.151944] x15: 0000a0d665e7ee58 x14: 000000000000011a
> > [    1.152060] x13: 0000000000000001 x12: 0000000000000000
> > [    1.152149] x11: 0000000000000000 x10: 0000000000000a60
> > [    1.152291] x9 : 0000000000000000 x8 : ffff0000c0a2a480
> > [    1.152429] x7 : 0000000000000000 x6 : ffff0000c0b0c9b8
> > [    1.152522] x5 : 0000000000001000 x4 : ffff0000c03613b0
> > [    1.152614] x3 : 0000000000000267 x2 : 0000000000000260
> > [    1.152731] x1 : fffffbfffe800000 x0 : 0000000000ffbffe
> > [    1.153135] Call trace:
> > [    1.153342]  logic_outb+0x3c/0xa8
> > [    1.153434]  mk712_init+0x74/0x1ec
> > [    1.153571]  do_one_initcall+0x54/0x1b8
> > [    1.153705]  kernel_init_freeable+0x1d0/0x238
> > [    1.153860]  kernel_init+0x14/0x118
> > [    1.153960]  ret_from_fork+0x10/0x30
> > [    1.154304] Code: d2bfd001 f2df7fe1 f2ffffe1 8b010273 (39000274)
> > [    1.155013] ---[ end trace f9b157c311d20edd ]---
> > [    1.155854] Kernel panic - not syncing: Attempted to kill init!
> exitcode=0x0000000b
> > [    1.156236] SMP: stopping secondary CPUs
> >
> > The driver is very old and resources are totally hardcoded, no bus model.
> > It seems the simplest way to fix this issue is disabling it by parameter.
> > If someone really needs the old driver, it should enable the parameter
> > by cmdline.
> 
> I wonder if we are not better off simply removing the driver. I doubt
> there are any "Gateway AOL Connected Touchpad computers left, especially
> ones that run 5.x kernels.


Same here. Once a platform selects this driver, the platform will crash during
boot. It seems we have no way to stop users from selecting it in Kconfig.

Thanks
Barry