1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index be9ae4fc5cbe..8245c82505cc 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1575,6 +1575,7 @@ static int mv_port_start(struct ata_port *ap)
         struct device *dev = ap->host->dev;
         struct mv_host_priv *hpriv = ap->host->private_data;
         struct mv_port_priv *pp;
+        unsigned long flags;
         int tag;
 
         pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
@@ -1610,8 +1611,12 @@ static int mv_port_start(struct ata_port *ap)
                         pp->sg_tbl_dma[tag] = pp->sg_tbl_dma[0];
                 }
         }
+
+        spin_lock_irqsave(ap->lock, flags);
         mv_save_cached_regs(ap);
         mv_edma_cfg(ap, 0, 0);
+        spin_unlock_irqrestore(ap->lock, flags);
+
         return 0;
 
 out_port_free_dma_mem:
@@ -1630,8 +1635,12 @@ out_port_free_dma_mem:
  */
 static void mv_port_stop(struct ata_port *ap)
 {
+        unsigned long flags;
+
+        spin_lock_irqsave(ap->lock, flags);
         mv_stop_edma(ap);
         mv_enable_port_irqs(ap, 0);
+        spin_unlock_irqrestore(ap->lock, flags);
         mv_port_free_dma_mem(ap);
 }