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| author | Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2014-07-03 10:18:14 -0500 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-07-25 17:16:59 -0400 |
| commit | 3fa89a04e064e586df4ed3208a8e62012a65b17f (patch) | |
| tree | 4786ffffea110d97e273c46680f85063cbf7accb /drivers/scsi/hpsa.c | |
| parent | 2a5ac32653786871f03a22ecd524617cf53e1b53 (diff) | |
| download | blackbird-obmc-linux-3fa89a04e064e586df4ed3208a8e62012a65b17f.tar.gz blackbird-obmc-linux-3fa89a04e064e586df4ed3208a8e62012a65b17f.zip | |
hpsa: fix 6-byte READ/WRITE with 0 length data xfer
a 6-byte READ/WRITE CDB with a 0 block data transfer really
means a 256 block data transfer. The RAID mapping code failed
to handle this case. For 10/12/16 byte READ/WRITEs, 0 just means
no data should be transferred, and should not trigger BUG_ON.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Reported-by: Robert Elliott <elliott@hp.com>
Reviewed-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/hpsa.c')
| -rw-r--r-- | drivers/scsi/hpsa.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 1d284730d66b..6edd2aaacbab 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -3686,6 +3686,8 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h, (((u64) cmd->cmnd[2]) << 8) | cmd->cmnd[3]; block_cnt = cmd->cmnd[4]; + if (block_cnt == 0) + block_cnt = 256; break; case WRITE_10: is_write = 1; @@ -3734,7 +3736,6 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h, default: return IO_ACCEL_INELIGIBLE; /* process via normal I/O path */ } - BUG_ON(block_cnt == 0); last_block = first_block + block_cnt - 1; /* check for write to non-RAID-0 */ |
