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Date: Sun, 16 Sep 2012 19:07:41 -0700 From: Greg KH <greg@...ah.com> To: Shuah Khan <shuah.khan@...com> Cc: konrad.wilk@...cle.com, joerg.roedel@....com, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, rob@...dley.net, akpm@...ux-foundation.org, bhelgaas@...gle.com, stern@...land.harvard.edu, shuahkhan@...il.com, devel@...uxdriverproject.org, x86@...nel.org, LKML <linux-kernel@...r.kernel.org>, linux-doc@...r.kernel.org Subject: Re: [PATCH] dma-debug: New interfaces to debug dma mapping errors On Sun, Sep 16, 2012 at 06:52:51PM -0600, Shuah Khan wrote: > +void debug_dma_dump_map_errors(struct device *dev, int all) > +{ > + if (all) { > + dev_info(dev, > + "DMA-API: DMA map error summary:\n" > + "DMA map errors returned = %d\n" > + "DMA map errors not checked = %d\n" > + "DMA unmap errors = %d\n" > + "SWIOTLB overflow triggers = %d\n", > + dev->dma_map_errors, > + dev->dma_map_errors_not_checked, > + dev->dma_unmap_errors, > + dev->iotlb_overflow_cnt); > + return; > + } > + > + if (dev->dma_map_errors_not_checked) { > + dev_err(dev, > + "DMA-API: Driver failed to check\n" > + "%d out of a total of %d DMA map errors returned\n" > + "by DMA mapping interfaces\n", > + dev->dma_map_errors_not_checked, > + dev->dma_map_errors); > + } > + > + if (dev->dma_unmap_errors) { > + dev_err(dev, > + "DMA-API: Driver tried to free invalid\n" > + "DMA addresses %d times\n", > + dev->dma_unmap_errors); > + } > + > + if (dev->iotlb_overflow_cnt) { > + dev_err(dev, > + "DMA-API: SWIOTLB overflow buffer triggered %d times\n", > + dev->iotlb_overflow_cnt); > + } > +} > +EXPORT_SYMBOL(debug_dma_dump_map_errors); Don't use syslog for stuff like this, that's not good. Why not use debugfs? greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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