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hpsa: correct transfer length for 6 byte read/write commands 

handle block counts of 0. Cleanup block and block count calculations.

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Justin Lindley <justin.lindley@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Don Brace 2015-11-04 15:50:50 -06:00 committed by Martin K. Petersen
parent 683fc44469
commit c8a6c9a6b4
1 changed files with 6 additions and 13 deletions
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19
drivers/scsi/hpsa.c
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@ -4012,19 +4012,14 @@ static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
case READ_6:
case READ_12:
if (*cdb_len == 6) {
block = (((u32) cdb[2]) << 8) | cdb[3];
block = get_unaligned_be16(&cdb[2]);
block_cnt = cdb[4];
if (block_cnt == 0)
block_cnt = 256;
} else {
BUG_ON(*cdb_len != 12);
block = (((u32) cdb[2]) << 24) |
(((u32) cdb[3]) << 16) |
(((u32) cdb[4]) << 8) |
cdb[5];
block_cnt =
(((u32) cdb[6]) << 24) |
(((u32) cdb[7]) << 16) |
(((u32) cdb[8]) << 8) |
cdb[9];
block = get_unaligned_be32(&cdb[2]);
block_cnt = get_unaligned_be32(&cdb[6]);
}
if (block_cnt > 0xffff)
return IO_ACCEL_INELIGIBLE;
@ -4410,9 +4405,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
case WRITE_6:
is_write = 1;
case READ_6:
first_block =
(((u64) cmd->cmnd[2]) << 8) |
cmd->cmnd[3];
first_block = get_unaligned_be16(&cmd->cmnd[2]);
block_cnt = cmd->cmnd[4];
if (block_cnt == 0)
block_cnt = 256;