On Mon, May 10, 2010 at 12:39:49PM -0400, Mike Frysinger wrote: > On Mon, May 10, 2010 at 06:42, Oskar Schirmer wrote: > > With dma based spi transmission, data corruption > > is observed occasionally. With dma buffers located > > right next to msg and xfer fields, cache lines > > correctly flushed in preparation for dma usage > > may be polluted again when writing to fields > > in the same cache line. > > > > Make sure cache fields used with dma do not > > share cache lines with fields changed during > > dma handling. As both fields are part of a > > struct that is allocated via kzalloc, thus > > cache aligned, moving the fields to the 1st > > position and insert padding for alignment > > does the job. > > Acked-by: Mike Frysinger <vapier@xxxxxxxxxx> > > i'm guessing Dmitry will pick it up now Yep. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
