Re: [bug] ata subsystem related crash with latest -git

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Jens Axboe wrote:
index 4df8311..b858183 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1139,6 +1139,7 @@ static void mv_fill_sg(struct ata_queued_cmd *qc)
 	struct mv_port_priv *pp = qc->ap->private_data;
 	struct scatterlist *sg;
 	struct mv_sg *mv_sg;
+	int end_marked = 0;
mv_sg = pp->sg_tbl;
 	ata_for_each_sg(sg, qc) {
@@ -1159,13 +1160,15 @@ static void mv_fill_sg(struct ata_queued_cmd *qc)
 			sg_len -= len;
 			addr += len;
- if (!sg_len && ata_sg_is_last(sg, qc))
+			if (!sg_len && ata_sg_is_last(sg, qc)) {
 				mv_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
+				end_marked++;
+			}
mv_sg++;
 		}
-
 	}
+	BUG_ON(end_marked != 1);


Your BUG_ON() does indeed trip, here.

Its surprising that other folks don't explode, considering that mv_fill_sg() intentionally mirrors the logic in ata_fill_sg().

	Jeff


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux