Op 25 sep 2008, om 15:27 heeft Philip Balister het volgende geschreven:
Jarkko Nikula wrote:On Tue, 23 Sep 2008 11:50:53 +0300 "ext Jarkko Nikula" <jarkko.nikula@xxxxxxxxx> wrote:On Tue, 23 Sep 2008 11:56:00 +0530 "ext Arun KS" <getarunks@xxxxxxxxx> wrote:Hi all, I am writing an ASOC driver for tlvaic23 on osk5912 platform. When do an aplay, I m getting a NULL pointer dereference. I added some debug prints in the soc/core/pcm_native.c, also in codec and platform drivers. The null pointer is comming in IOCTL SNDRV_PCM_IOCTL_SYNC_PTR. Log is pasted below.It's good that you can reproduce this on OSK as well. I think some configuration difference is revealing this bug out. Forinstance I can trigger this on Beagle with overo_defconfig + manuallyadding support for Beagle (CONFIG_MACH_OMAP3_BEAGLE=y) and ASoC Beagle (CONFIG_SND_OMAP_SOC_OMAP3_BEAGLE=y). But I cannot reproduce this with Beagle defconfig + manually adding support for Overo (CONFIG_MACH_OVERO=y) and ASoC Beagle (CONFIG_SND_OMAP_SOC_OMAP3_BEAGLE=y).I narrowed this into CONFIG_SLUB. When it's set, I can reproduce the bug both with N810 and Beagle but not when using CONFIG_SLAB. Can you try will the problem disappear on your OSK and Overo if you select slab allocator instead? You find selection under "General setup" menu.I've also verified this works on a Beagle with Angstrom. Thanks for tracking this down!
For people wanting to test it: http://www.angstrom-distribution.org/demo/beagleboard/uImage regards, Koen
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