diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index 398d2af..cbe5fab 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -2860,10 +2860,8 @@
 {
 	struct pmcraid_cmd *cancel_cmd;
 	struct pmcraid_instance *pinstance;
-	struct pmcraid_resource_entry *res;
 
 	pinstance = (struct pmcraid_instance *)cmd->drv_inst;
-	res = cmd->scsi_cmd->device->hostdata;
 
 	cancel_cmd = pmcraid_get_free_cmd(pinstance);
 
@@ -3973,9 +3971,7 @@
 	.open = pmcraid_chr_open,
 	.fasync = pmcraid_chr_fasync,
 	.unlocked_ioctl = pmcraid_chr_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl = pmcraid_chr_ioctl,
-#endif
+	.compat_ioctl = compat_ptr_ioctl,
 	.llseek = noop_llseek,
 };
 
@@ -4654,7 +4650,7 @@
 
 	for (i = 0; i < PMCRAID_MAX_CMD; i++) {
 		pinstance->cmd_list[i]->ioa_cb =
-			dma_pool_alloc(
+			dma_pool_zalloc(
 				pinstance->control_pool,
 				GFP_KERNEL,
 				&(pinstance->cmd_list[i]->ioa_cb_bus_addr));
@@ -4663,8 +4659,6 @@
 			pmcraid_release_control_blocks(pinstance, i);
 			return -ENOMEM;
 		}
-		memset(pinstance->cmd_list[i]->ioa_cb, 0,
-			sizeof(struct pmcraid_control_block));
 	}
 	return 0;
 }
@@ -4720,7 +4714,6 @@
 			return -ENOMEM;
 		}
 
-		memset(pinstance->hrrq_start[i], 0, buffer_size);
 		pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
 		pinstance->hrrq_end[i] =
 			pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;