From: robert.jarzmik@free•fr (Robert Jarzmik)
To: linux-arm-kernel@lists•infradead.org
Subject: pxa27x_udc: Oops on probe with usb cable connected.
Date: Fri, 02 Jul 2010 20:17:42 +0200 [thread overview]
Message-ID: <877hld7np5.fsf@free.fr> (raw)
In-Reply-To: <20100630115310.bcf967c1.ospite@studenti.unina.it> (Antonio Ospite's message of "Wed\, 30 Jun 2010 11\:53\:10 +0200")
Antonio Ospite <ospite@studenti•unina.it> writes:
> Note that using the original blob bootloader from Motorola there is no
> Oops but the UDC does not work at all, but maybe this is another
> issue, I mean: should pxa27x_udc probe consider the case when UDC is
> already active?
It was not designed for, but it actually works on my platform, when I launch
linux kernel from haret without disabling the UDC.
> Tell me how can i help debugging this, I've put the binary and the
> disassembled code in http://people.openezx.org/ao2/tmp/pxa27x-udc_BUG/
> plus some notes about old discussions on the same matter.
There are a few things I can do with a little more information.
- Prevent gcc from being too smart by inlining functions : I think the right
flag is -fno-inline. This will prevent irq_handle_data() and others to be
inlined into pxa_udc_irq(), and ease the debugging.
- add, on the first line of pxa27x_udc.c :
#define DEBUG 1
#define VERBOSE_DEBUG 1
Then, crash your device, and provide me with the very same traces as before :
- the log
- the module disassembly (which will contain irq_handle_data() and others
I will work from that.
Cheers.
--
Robert
next prev parent reply other threads:[~2010-07-02 18:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-30 9:53 pxa27x_udc: Oops on probe with usb cable connected Antonio Ospite
2010-07-02 18:17 ` Robert Jarzmik [this message]
2010-07-03 20:10 ` Antonio Ospite
2010-07-03 23:48 ` Robert Jarzmik
2010-07-05 8:40 ` Antonio Ospite
2010-07-06 22:34 ` Robert Jarzmik
2010-07-06 22:56 ` Antonio Ospite
2010-07-11 8:13 ` Robert Jarzmik
2010-07-22 15:14 ` Antonio Ospite
2010-07-23 11:18 ` Antonio Ospite
2010-07-23 19:07 ` Robert Jarzmik
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