handle block counts of 0. Cleanup block and block count calculations.
Reviewed-by: Scott Teel <scott.teel@xxxxxxxx>
Reviewed-by: Justin Lindley <justin.lindley@xxxxxxxx>
Reviewed-by: Kevin Barnett <kevin.barnett@xxxxxxxx>
Signed-off-by: Don Brace <don.brace@xxxxxxxx>
---
drivers/scsi/hpsa.c | 19 ++++++-------------
1 file changed, 6 insertions(+), 13 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index e1ee06d..3520d75 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4005,19 +4005,14 @@ 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;
@@ -4403,9 +4398,7 @@ 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;
--
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