On Thu, Aug 25, 2016 at 1:23 AM, Tom Yan <tom.ty89@xxxxxxxxx> wrote: > You only fill the bytes that you want to to set explicitly: > > + put_unaligned_le16(0x0002, &sctpg[0]); /* SCT_ACT_WRITE_SAME */ > + put_unaligned_le16(0x0101, &sctpg[1]); /* WRITE PTRN FG */ > + put_unaligned_le64(lba, &sctpg[2]); > + put_unaligned_le64(num, &sctpg[6]); > + put_unaligned_le32(0u, &sctpg[10]); > > What I doubted is, if you don't memset (zero-fill) the buffer first, > will other bytes have indeterministic value that causes random > unexpected behavior? No. If there is random or unexpected behaviour the device is broken and some other remedy, such as blacklisting, is required. --- Shaun -- 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
