topic Re: Kernel Panic not syncing : Fatal exception in interrupt in i.MX Processors

Kernel Panic not syncing : Fatal exception in interrupt

remukelly — Mon, 25 Jan 2016 11:39:14 GMT

Hi,

I am using IMX6qsabrelite board with android JB 4.2.2. with linux kernel version 3.0.35.

I am facing kernel panic sometimes during boot as below:-

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Kernel panic - not syncing: Fatal exception

[<c0051a04>] (unwind_backtrace+0x0/0x138) from [<c0638ab0>] (panic+0x90/0x1c0)

[<c0638ab0>] (panic+0x90/0x1c0) from [<c004e470>] (die+0x218/0x284)

[<c004e470>] (die+0x218/0x284) from [<c0044468>] (do_DataAbort+0x8c/0x9c)

[<c0044468>] (do_DataAbort+0x8c/0x9c) from [<c004a2d0>] (__dabt_svc+0x70/0xa0)

Exception stack(0xd64e3ee8 to 0xd64e3f30)

3ee0: d6946c00 00000001 00000000 00000000 d24dcc58 d6946c0c

3f00: d6946d34 d635c800 d6946c00 00000000 d6946c38 d64e3f44 00000000 d64e3f30

3f20: c0429824 c063f608 60000013 ffffffff

[<c004a2d0>] (__dabt_svc+0x70/0xa0) from [<c063f608>] (_raw_spin_unlock_irq+0x18/0x40)

[<c063f608>] (_raw_spin_unlock_irq+0x18/0x40) from [<c0429824>] (mmc_blk_issue_rw_rq+0x234/0x2d8)

[<c0429824>] (mmc_blk_issue_rw_rq+0x234/0x2d8) from [<c0429efc>] (mmc_blk_issue_rq+0x19c/0x33c)

[<c0429efc>] (mmc_blk_issue_rq+0x19c/0x33c) from [<c042a910>] (mmc_queue_thread+0x5c/0x100)

[<c042a910>] (mmc_queue_thread+0x5c/0x100) from [<c00aaaec>] (kthread+0x80/0x88)

[<c00aaaec>] (kthread+0x80/0x88) from [<c004b408>] (kernel_thread_exit+0x0/0x8)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Please help, what could be the problem here?

Re: Kernel Panic not syncing : Fatal exception in interrupt

gary_bisson — Mon, 25 Jan 2016 14:05:53 GMT

Hi,

Looks like a SD card corruption (mmc_blk_issue), have you tried with another SD card?

Also we now recommend SabreLite users to use Lollipop:

https://boundarydevices.com/android-lollipop-5-0-0-ga-release-for-i-mx6-boards/

Regards,

Gary

Re: Kernel Panic not syncing : Fatal exception in interrupt

remukelly — Tue, 26 Jan 2016 16:01:21 GMT

Hi Gary,

I am not using external SD card, but this panic may be occuring in the

internel MMC.

I have a lollipop upgrade already, but I need to fix this JB panic issue

specifically.

Is this panic issue is known on JB version? if known do we have a patch

available?

On Mon, Jan 25, 2016 at 7:36 PM, gary_bisson <admin@community.freescale.com>

Re: Kernel Panic not syncing : Fatal exception in interrupt

gary_bisson — Tue, 26 Jan 2016 16:06:50 GMT

Hi,

What do you mean by "internal MMC"? The SabreLite only offers two slots to external cards, there's no internal storage apart from the 2MB NOR flash.

I'm not aware of a specific issue with the JB version, but since the kernel is very old my upgrade suggestion was just a wild guess to avoid old issues.

Regards,

Gary

Re: Kernel Panic not syncing : Fatal exception in interrupt

remukelly — Tue, 26 Jan 2016 17:07:57 GMT

Hi Gary,

I found this below patch:-

https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/drivers/mmc/card/block.c?id=ecf8b5d0a378a0f922ffca27bd0a9101f246fa11

this looks like can fix this panic, as the issue is with spin_unlock

operation.

On Tue, Jan 26, 2016 at 9:38 PM, gary_bisson <admin@community.freescale.com>