From: robin.murphy@arm•com (Robin Murphy)
To: linux-arm-kernel@lists•infradead.org
Subject: HDLCD crashes with 6d910bfa809e
Date: Tue, 7 Jun 2016 15:11:14 +0100 [thread overview]
Message-ID: <5756D602.4090305@arm.com> (raw)
In-Reply-To: <20160607133535.GA1165@e106497-lin.cambridge.arm.com>
Hi Liviu,
On 07/06/16 14:35, liviu.dudau at arm.com wrote:
> On Tue, Jun 07, 2016 at 01:06:00PM +0100, Robin Murphy wrote:
>> Having just inadvertently merged -next into my working branch, I find
>> dev6d910bfa809e ("drm/hlcd: Use lockless gem BO free callback") adversely
>> affecting my board's ability to boot ;)
>>
>> Since I (intentionally) don't have sufficient CMA to create a framebuffer,
>> drm_gem_cma_create() fails, unconditionally calls the now-NULL
>> drm->driver->gem_free_object() in its cleanup path, and fiery death
>> ensues...
>
> Thanks for reporting this. What other changes other than reducing the CMA
> allocation size do you have that I might need in order to reproduce this?
I've just confirmed a plain checkout of next-20160602, using arm64
defconfig + DRM + HDLCD + TDA998X and CMA_SIZE_MBYTES=1, booted on a
Juno, does the job:
[ 3.032402] hdlcd 7ff60000.hdlcd: bound 0-0070 (ops tda998x_ops)
[ 3.038388] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 3.044970] [drm] No driver support for vblank timestamp query.
[ 3.076973] hdlcd 7ff60000.hdlcd: failed to allocate buffer with size
7680000
[ 3.084081] Bad mode in Synchronous Abort handler detected, code
0x86000004 -- IABT (current EL)
[ 3.092815] CPU: 3 PID: 6 Comm: kworker/u12:0 Not tainted
4.7.0-rc1-next-20160602 #686
[ 3.100682] Hardware name: ARM Juno development board (r1) (DT)
[ 3.106567] Workqueue: deferwq deferred_probe_work_func
[ 3.111761] task: ffff8009768a3e80 ti: ffff8009768e8000 task.ti:
ffff8009768e8000
[ 3.119198] PC is at 0x0
[ 3.121720] LR is at drm_gem_cma_create+0x128/0x130
...and so on.
Today's -next, on the other hand, dodges the bullet entirely:
[ 2.903645] [drm] found ARM HDLCD version r0p0
[ 2.908122] hdlcd 7ff60000.hdlcd: master bind failed: -22
[ 2.913505] tda998x: probe of 0-0070 failed with error -22
[ 2.919141] [drm] found ARM HDLCD version r0p0
[ 2.923609] hdlcd 7ff50000.hdlcd: master bind failed: -22
[ 2.928991] tda998x: probe of 0-0071 failed with error -22
Oh well...
Robin.
next prev parent reply other threads:[~2016-06-07 14:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 12:06 HDLCD crashes with 6d910bfa809e Robin Murphy
2016-06-07 13:35 ` liviu.dudau at arm.com
2016-06-07 14:11 ` Robin Murphy [this message]
2016-06-07 14:14 ` liviu.dudau at arm.com
2016-06-07 14:15 ` liviu.dudau at arm.com
2016-06-07 14:34 ` liviu.dudau at arm.com
2016-06-08 6:51 ` [PATCH] of: reserved_mem: restore old behavior when no region is defined Marek Szyprowski
2016-06-08 7:35 ` Sylwester Nawrocki
2016-06-08 10:49 ` Liviu Dudau
2016-06-08 13:05 ` Rob Herring
2016-06-08 15:35 ` Sumit Semwal
2016-06-08 6:58 ` HDLCD crashes with 6d910bfa809e Marek Szyprowski
2016-06-08 9:05 ` liviu.dudau at arm.com
2016-06-08 10:01 ` Marek Szyprowski
2016-06-08 10:42 ` liviu.dudau at arm.com
2016-06-07 14:40 ` Daniel Vetter
2016-06-07 16:42 ` Robin Murphy
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