On Wed, Feb 24, 2016 at 03:16:43PM +0000, Harvey Hunt wrote: > The id buffer in ata_device is a DMA target, but it isn't explicitly > cacheline aligned. Due to this, adjacent fields can be overwritten with > stale data from memory on non coherent architectures. As a result, the > kernel is sometimes unable to communicate with an ATA device. > > Fix this by ensuring that the id buffer is cacheline aligned. > > This issue is similar to that fixed by Commit 84bda12af31f > ("libata: align ap->sector_buf"). > > Signed-off-by: Harvey Hunt <harvey.hunt@xxxxxxxxxx> > Cc: linux-kernel@xxxxxxxxxxxxxxx > Cc: <stable@xxxxxxxxxxxxxxx> # 2.6.18 Applied to libata/for-4.5-fixes. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html