diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index f6da46d..b05737a 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -1715,9 +1715,12 @@
 	struct mesh_state *ms = (struct mesh_state *) cmd->device->host->hostdata;
 	volatile struct mesh_regs __iomem *mr = ms->mesh;
 	volatile struct dbdma_regs __iomem *md = ms->dma;
+	unsigned long flags;
 
 	printk(KERN_DEBUG "mesh_host_reset\n");
 
+	spin_lock_irqsave(ms->host->host_lock, flags);
+
 	/* Reset the controller & dbdma channel */
 	out_le32(&md->control, (RUN|PAUSE|FLUSH|WAKE) << 16);	/* stop dma */
 	out_8(&mr->exception, 0xff);	/* clear all exception bits */
@@ -1739,6 +1742,7 @@
 	/* Complete pending commands */
 	handle_reset(ms);
 	
+	spin_unlock_irqrestore(ms->host->host_lock, flags);
 	return SUCCESS;
 }