Hi Kevin, While using pm runtime API's with DMA, it was observed that, during omap_free_dma, pm_runtime_put_sync is called which results in warning dump. It looks like, when cpu idle patch is under processing, DMA interrupt gets fired which inturn call omap_free_dma which results multiple spin_locks. The DMA driver uses *_get_sync during omap_request_dma and *_put_sync during omap_free_dma.
Environment: Kernel: git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git Branch: master Commit: 99cf630 Linux-omap rebuilt: Fixed omap4 kernel panic without nosmp, updated to -rc7 + DMA hwmod patches defconfig: omap2plus_defconfig board: OMAP3630 Zoom3 Is this a known issue or issue with pm runtime API usage in DMA driver? log: http://pastebin.com/93KPk2ng Regards, Manjunath -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
