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Re: [PATCH] ARM: keystone: add a work around to handle asynchronous external abort

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Am Dienstag, den 18.08.2015, 09:13 +0100 schrieb Russell King - ARM
Linux:
> On Mon, Aug 17, 2015 at 08:09:17PM -0700, santosh.shilimkar@oracle.com wrote:
> > From the logs this seems to be mostly clock related issue for some
> > peripheral. If the bootloader clock enable all hack still exists,
> > may be you can try that out.
> > 
> > Another way to debug this is to start disabling peripheral drivers
> > from the kernel 1 by 1 and see if the issue goes away.
> 
> Highly unlikely to make any difference.  As the failure happens soo early
> with the patch applied, the kernel hasn't had much of a chance to touch
> the hardware - about the only things are the decompressor and the kernel
> touching the early console.  As they seem to be working, it suggests
> that's not the cause.
> 
> It seems to be pointing towards something in the boot loader...
> 
> Normally, uboot will hook itself into the vectors to report errors, but
> I wonder whether uboot enables asynchronous aborts while it's running.
> Don't forget to make sure that the aborts are disabled again prior to
> calling the kernel.
> 
At least one of the Marvell platforms has the same issue with the
bootloader (I think it is some downstream U-Boot) leaving an imprecise
abort hanging around as a nice present for Linux to crash on.

If it turns out to be the same issue the only kernel level workaround
would be to ignore exactly 1 abort after bootup.

Then we still need a solution for the platform and the PCIe driver abort
handler both hooking into the same abort vector, which won't work
currently.

Regards,
Lucas
-- 
Pengutronix e.K.             | Lucas Stach                 |
Industrial Linux Solutions   | http://www.pengutronix.de/  |

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[PATCH] ARM: keystone: add a work around to handle asynchronous external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-11 21:20 +0200
  Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-08-14 16:10 +0200
    Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Lucas Stach <l.stach@pengutronix.de> - 2015-08-14 16:30 +0200
      Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-15 00:00 +0200
        Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-08-15 00:00 +0200
          Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-17 16:20 +0200
    Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort santosh shilimkar <santosh.shilimkar@oracle.com> - 2015-08-14 17:20 +0200
      Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-08-15 00:00 +0200
        Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-18 00:20 +0200
          Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-08-18 00:50 +0200
          Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort "santosh.shilimkar@oracle.com" <santosh.shilimkar@oracle.com> - 2015-08-18 05:20 +0200
            Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-08-18 10:20 +0200
              Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Lucas Stach <l.stach@pengutronix.de> - 2015-08-18 10:30 +0200
                Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Afzal Mohammed <afzal.mohd.ma@gmail.com> - 2015-08-18 14:10 +0200
              Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Jisheng Zhang <jszhang@marvell.com> - 2015-08-18 10:40 +0200
                Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-18 17:00 +0200
              Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-18 22:30 +0200
      Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-15 00:00 +0200
        Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort "santosh.shilimkar@oracle.com" <santosh.shilimkar@oracle.com> - 2015-08-15 02:10 +0200
  Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-14 16:10 +0200
    Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Lucas Stach <l.stach@pengutronix.de> - 2015-08-14 16:20 +0200
      Re: [PATCH] ARM: keystone: add a work around to handle asynchronous  external abort Murali Karicheri <m-karicheri2@ti.com> - 2015-08-17 16:20 +0200

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