> I did some printk debugging. > __atapi_pio_bytes is called with bytes=18. That means with 32bit transfers > there is a 2 byte trailing transfer, which triggers this WARN_ON. Ouch.. that means all that someone issued a multiple segment data transfer with a 2 byte aligned chunk in the middle. That is a bit of a suprise because we set blk_queue_dma_alignment to 3 so the block layer should never hand us an sg list in that form. That means we've either got a block layer bug or someone somewhere is generating invalid sg lists internally to libata. Can you dump qc->cdb[] and see what command is getting issued in the broken form ? Alan -- 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
