Hello Sam Bradshaw, The patch 88523a61558a: "block: Add driver for Micron RealSSD pcie flash cards" from Aug 30, 2011, creates an endian bug: drivers/block/mtip32xx/mtip32xx.c:2468 mtip_hw_submit_io()
drivers/block/mtip32xx/mtip32xx.c 2465 fis->opts = 1 << 7; 2466 fis->command = 2467 (dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE); 2468 *((unsigned int *) &fis->lba_low) = (start & 0xFFFFFF); ^^^^^^^^^^^^ 2469 *((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xFFFFFF); ^^^^^^^^^^^^^^^ These addresses point to a series of four unions inside the host_to_dev_fis struct. The unions will be set to different values depending on if the CPU is big or little endian. If you knew which endianness this works on, then you could probably add a cpu_to_be32() or cpu_to_le32(). 2470 fis->device = 1 << 6; 2471 fis->features = nsect & 0xFF; regards, dan carpenter -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/