On Tue, Dec 4, 2012 at 6:51 PM, Juri Lelli <juri.le...@gmail.com> wrote: > Hi all, > in the process of testing scheduler patches on a Pandaboard ES, I > found a possible regression regarding OMAP mmc. The system is a > Pandaboard ES (OMAP4460 ES1.1) running Linaro 12.10 (GNU/Linux > 3.4.0-2-linaro-lt-omap armv7l). > > The problem is that the system remains stuck at boot time trying > to mount the root device. > > This is what I got via git bisect from Linux 3.5 and Linux 3.7-rc7: > > 26b88520b80695a6fa5fd95b5d97c03f4daf87e0 is the first bad commit > commit 26b88520b80695a6fa5fd95b5d97c03f4daf87e0 > Author: Russell King <rmk+ker...@arm.linux.org.uk> > Date: Fri Apr 13 12:27:37 2012 +0100 > > mmc: omap_hsmmc: remove private DMA API implementation > Remove the private DMA API implementation from omap_hsmmc, making it > use entirely the DMA engine API. > Tested-by: Tony Lindgren <t...@atomide.com> > Tested-by: Venkatraman S <svenk...@ti.com> > Signed-off-by: Russell King <rmk+ker...@arm.linux.org.uk> > > :040000 040000 03cff4d68cc92ea652ef8e0c6ac74af804bc9f00 > a9763c6b364bfc66b5fcd4cada7315befcbd62e8 M drivers > > Here instead the two boot traces, before (all OK) and after the bad > commit. >
> [ 1.661041] sdhci: Secure Digital Host Controller Interface driver > [ 1.667602] sdhci: Copyright(c) Pierre Ossman > [ 1.673736] omap_hsmmc omap_hsmmc.0: Failed to get debounce clk > [ 1.679992] omap_hsmmc omap_hsmmc.0: unable to obtain RX DMA engine > channel 62 > [ 1.687774] omap_hsmmc omap_hsmmc.0: unable to obtain TX DMA engine > channel 61 > [ 1.745422] omap_hsmmc omap_hsmmc.4: Failed to get debounce clk > [ 1.751647] omap_hsmmc omap_hsmmc.4: unable to obtain RX DMA engine > channel 60 > [ 1.759277] omap_hsmmc omap_hsmmc.4: unable to obtain TX DMA engine > channel 59 Change: > # CONFIG_DMADEVICES is not set To: CONFIG_DMADEVICES=y # CONFIG_DMADEVICES_DEBUG is not set # # DMA Devices # # CONFIG_DW_DMAC is not set CONFIG_TIMB_DMA=m # CONFIG_TI_EDMA is not set CONFIG_DMA_OMAP=y CONFIG_DMA_ENGINE=y CONFIG_DMA_VIRTUAL_CHANNELS=y Regards, -- Robert Nelson http://www.rcn-ee.com/ _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
