1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c
index bcf92917bbf3..254ec62b5f58 100644
--- a/drivers/net/dm9000.c
+++ b/drivers/net/dm9000.c
@@ -930,13 +930,15 @@ static irqreturn_t dm9000_interrupt(int irq, void *dev_id)
         struct net_device *dev = dev_id;
         board_info_t *db = netdev_priv(dev);
         int int_status;
+        unsigned long flags;
         u8 reg_save;
 
         dm9000_dbg(db, 3, "entering %s\n", __func__);
 
         /* A real interrupt coming */
 
-        spin_lock(&db->lock);
+        /* holders of db->lock must always block IRQs */
+        spin_lock_irqsave(&db->lock, flags);
 
         /* Save previous register address */
         reg_save = readb(db->io_addr);
@@ -972,7 +974,7 @@ static irqreturn_t dm9000_interrupt(int irq, void *dev_id)
         /* Restore previous register address */
         writeb(reg_save, db->io_addr);
 
-        spin_unlock(&db->lock);
+        spin_unlock_irqrestore(&db->lock, flags);
 
         return IRQ_HANDLED;
 }