Kernel Panic not syncing : Fatal exception in interrupt

[remukelly]

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?

[gary_bisson]

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

[remukelly]

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>

[gary_bisson]

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

[remukelly]

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...

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>