From: Stephen Cameron Date: Fri, 23 Jan 2015 22:44:01 +0000 (-0600) Subject: hpsa: remove incorrect BUG_ONs checking for raid offload enable X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=6f99a9160f1947569bc17b85fbe7353a1090dfe7;p=deliverable%2Flinux.git hpsa: remove incorrect BUG_ONs checking for raid offload enable In set_encrypt_ioaccel2() and in hpsa_scsi_ioaccel_raid_map there were BUG_ONs that looked like this: BUG_ON(!(dev->offload_config && dev->offload_enabled)); But, In hpsa_ack_ctlr_events() we have this, /* Stop sending new RAID offload reqs via the IO accelerator */ scsi_block_requests(h->scsi_host); for (i = 0; i < h->ndevices; i++) h->dev[i]->offload_enabled = 0; hpsa_drain_accel_commands(h); So, we set offload_enabled = 0 for all drives, then do this drain_accel_commands, so that means accel commands could still be in flight, ie. perhaps having just been submitted into hpsa_scsi_ioaccel_raid_map concurrent with ->offload_enabled having just been set to zero. Reviewed-by: Scott Teel Signed-off-by: Don Brace Signed-off-by: Christoph Hellwig --- diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index bae3759e30e2..5abd49d85940 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -3456,8 +3456,6 @@ static void set_encrypt_ioaccel2(struct ctlr_info *h, struct raid_map_data *map = &dev->raid_map; u64 first_block; - BUG_ON(!(dev->offload_config && dev->offload_enabled)); - /* Are we doing encryption on this device */ if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON)) return; @@ -3688,8 +3686,6 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h, #endif int offload_to_mirror; - BUG_ON(!(dev->offload_config && dev->offload_enabled)); - /* check for valid opcode, get LBA and block count */ switch (cmd->cmnd[0]) { case WRITE_6: