scsi: dpt_i2o: rename adpt_i2o_to_scsi() to adpt_i2o_scsi_complete()

Rename the badly named function into adpt_i2o_scsi_complete(), and make it
a void function as the return value is never used.  This also fixes a
potential use-after-free as the return value might be evaluated from the
command result after the command has been freed.

Link: https://lore.kernel.org/r/20200228075318.91255-2-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/dpt_i2o.c

@@ -2173,7 +2173,7 @@ static irqreturn_t adpt_isr(int irq, void *dev_id)
 						 readl(reply + 12) - 1);
 			if(cmd != NULL){
 				scsi_dma_unmap(cmd);
-				adpt_i2o_to_scsi(reply, cmd);
+				adpt_i2o_scsi_complete(reply, cmd);
 			}
 		}
 		writel(m, pHba->reply_port);
@@ -2341,7 +2341,7 @@ static s32 adpt_scsi_host_alloc(adpt_hba* pHba, struct scsi_host_template *sht)
 }
 
 
-static s32 adpt_i2o_to_scsi(void __iomem *reply, struct scsi_cmnd* cmd)
+static void adpt_i2o_scsi_complete(void __iomem *reply, struct scsi_cmnd *cmd)
 {
 	adpt_hba* pHba;
 	u32 hba_status;
@@ -2459,7 +2459,6 @@ static s32 adpt_i2o_to_scsi(void __iomem *reply, struct scsi_cmnd* cmd)
 	if(cmd->scsi_done != NULL){
 		cmd->scsi_done(cmd);
 	} 
-	return cmd->result;
 }
 
 

drivers/scsi/dpti.h

@@ -286,7 +286,7 @@ static s32 adpt_i2o_status_get(adpt_hba* pHba);
 static s32 adpt_i2o_init_outbound_q(adpt_hba* pHba);
 static s32 adpt_i2o_hrt_get(adpt_hba* pHba);
 static s32 adpt_scsi_to_i2o(adpt_hba* pHba, struct scsi_cmnd* cmd, struct adpt_device* dptdevice);
-static s32 adpt_i2o_to_scsi(void __iomem *reply, struct scsi_cmnd* cmd);
+static void adpt_i2o_scsi_complete(void __iomem *reply, struct scsi_cmnd *cmd);
 static s32 adpt_scsi_host_alloc(adpt_hba* pHba,struct scsi_host_template * sht);
 static s32 adpt_hba_reset(adpt_hba* pHba);
 static s32 adpt_i2o_reset_hba(adpt_hba* pHba);